Always researching the cheapest tech is a bad strategy! If you play on level suicide where all AIs at set to ultimate you will lose with this strategy. At this level you need to always be working to one or more goals.
Everytime you make a research choice you need to consider more than the cost of a tech but also how it will assist you in achieving your goals. One turn researching a cheap tech that does not help you is a wasted opportunity.
Here are the research choices I made in a recent game taken from an AAR I'll be posting soon:
Map: Medium
Stars: Common (Loose Clusters)
Planets: Common
Habital Planets: Common
Asteriods: Abundant
Anomalies: Abundant
All vixtory conditions enabled.
Tech trading off.
Very fast research.
Mega events on.
Level: Suicide
6 Ultimate AIs:
Altarian Resistance
Torian Confederation
Krynn Consulate
Thalan Empire
Drengin Empire
Koranth Clan
Minors: Random (It turned out there was one, the Akilians)
I'm playing a custom race called the Lexionians.
Super Ability: Super Warrior (First Strike)
Economics: +20% (Policital Party: Federalists)
Logistics: +6
LucK: +25% (1 race point)
Morale: +10% (1 race point)
Population Growth: +40% (5 race points)
Speed: +2 (8 race points)
Starting techs:
Galactic Warfare (MP +10%)
Xeno Engineering (SP +10%)
Planetary Improvements (MP/SP/RP +10%)
Stellary Cartography
Legend: MP = Military Production, SP = Social Production, RP = Research Production, PG = Population Growth, E = Economy, M = Morale, PI = Planetary Improvement, TG = Trade Good, D = Diplomacy, S = Soldiering
The first year my focus was exploration, colonization, claiming galactic resources, and claiming anomalies, and growing my economy/morale/population/production/research. Since I'm playing the all factories strategy I ignore the research branch except for Advanced Computing (E. Starbase Module: Smart Drones [MP/SP/RP +4%]) and miniturization.
List of Techs Researched the 1st Year in Chronological Order:
Xeno Industrial Theory (SP +10%, PI: Factory, Manufacturing Capital, E. Starbase Module: Adv. Starbase Factory [MP/SP/RP +4%], M. Starbase Module: Mining Headquaters +5%)
Space Militarization (MP +10%)
HyperDrive -> New Propulsion Techniques -> Ion Drive (Ship: Constructor S3)
Sensors Mark I (Sensor Range +1, Ship: Survey Ship S3)
Impulse Drive (Speed +1)
Xeno Economics (E +10%, PI: Adv. Market Center)
Basic Logistics (+3 now 9)
Space Mining 1 (Level 2 Mining Base on Asteriods)
Xeno Factory Construction (PI: Enhanced Factory, E. Starbase Module: Massive Scaling Center [MP/SP/RP +4%], M. Starbase Module: Resource Excavation +5%)
General Life Support (Range +20, needed for my survey ships)
Extended Life Support (Range +40, needed for my survey ships)
Xeno Research -> Advanced Computing (E. Starbase Module: Smart Drones [MP/SP/RP +4%])
Basic Miniturization (+10%) -> Enhanced Miniturization (+15%, Ship: Colony Ship S3)
Soil Enhancement
Xeno Biology
-> Extreme Colonization
-> Aquatic World Colonization
-> Barren World Colonization
-> Toxic World Colonization
-> Xeno Medicine (PG +10%)
Xeno Communications (D +5%) -> Universal Translator (D +5%)
-> Interstellar Governments (D +5%, note researched in the same turn as the other two above)
-> Xeno Entertainment (Morale +15%)
-> Dipolmatic Relations (D +10%)
-> Trade (D +10%, Trade +10%, Routes +3, PI: Economic Capital)
-> Advanced Trade (Trade +10%, Routes +3)
-> Alliances (D +10%)
The 2nd year my focus was growing my economy/morale/population/production/research.
List of Techs Researched the 2nd Year in Chronological Order:
Interstellar Republic (D +10%, Influence +5%, Govt: Interstellar Republic = E +10%)
-> Star Democracy (D +10%, Influence +5%, Govt: Star Democracy = E +20%)
Master Trade (Trade +10%, Routes +3)
Habitat Improvement
Xeno Ethics ((D +5%, TG: Harmony Crystals = M +20%)
-> Good and Evil (D +10%)
-> Concepts of Malice (D +10%, Artifical Slave Center = MP +50%, Mind Control Center = E +100%, No Mercy Invasion Center)
Terraforming
Xeno Trade Centers (PI: Trade Centers)
-> Xeno Bank Construction (E +5%, PI: Banking Center)
-> Galactic Stock Exchanges (PI: Stock Market)
Extreme Entertaiment (TG: Ultra Spices = M +15%)
Advanced Aquatic World Colonization
Advanced Barren World Colonization
Advanced Toxic Atmosphere Reductor
Xeno Farm Construction I
Sensors II -> Sensors III -> Sensors IV (Eyes of the Universe)
The 3rd year my focus was war! So I researched all the invasion techs plus planetary defense for the soldiering bonus. I researched weapons, engines, hulls, miniturization, and logistics for better ships and larger fleets. Note if you have the Super Warrior(first-strike) ability, logistics is very valuable and defense does not matter much.
Manufacturing Centers not only let me upgrade my Enchanced Factories but also let me upgrade my economic(+21%) and mining(+34%) starbases!
List of Techs Researched the 3rd Year in Chronological Order:
Space Weapons -> ... -> Psionic Beam (Star Falcon)
Planetary Invasion -> Planetary Bombardment (S +5%) -> Stellar Marines (S +15%) -> Adv. Troop Mod (Troop Transport) -> Shock Troops (S +%15)
Tidal Disruption (S +15%)
Planetary Defense (S +%10) -> Adv. Planetary Defense (S +%10)
Impulse Drive II -> Warp Drive (Speed +1)
Advanced Hulls
Stole: Shields
Medium Scale Building (Ship: Star Eagle) -> Superior Hulls -> Stole: Large Scale Building (Ship: Star Hawk)
Stole: Advanced Miniturization (+15%, Ships: Star Hawk II, Constructor S1-T, Space Miner S1-T, Space Miner - S2-S)
Manufacturing Centers (PI: Manufacturing Center, E. Starbase Module: Intersellar Collectors [MP/SP/RP +4%], M. Starbase Modules: Extraction Center +5%, Extraction Complex +5%)
Enhanced Logistics (+6 now 15)
Expert Miniturization (+15%, Ships: Star Hawk III, Troop Transport S4B3)
Fertility Acceleration (PG +10%, PI: Fertility Clinic)
Stole: Fusion Power Plants (PI: Fusion Power Plant)
Stole: Space Mining II
Stole: Phasors IV
Stole: Anti-Matter Power Plants (PI: Anti-Matter Power Plant)
Advanced Logistics (+9 now 24)
Heavy Gravity Colonization -> Advanced Heavy Gravity Colonization
Ultimate Miniturization (+20%)
Warp Drive II (Ships: Star Hawk IV)
Master Hull Building (HP +15%)
The 4th year my focus was war!
Industrial Sectors allowed me to fully buildup my economic(+24%) and mining starbases(+39%).
List of Techs Researched the 4th Year in Chronological Order:
Stole: Total Majesty (D +20%)
Stole: Stole Warp Drive V
Stole: Star Federation (D +10%, Influence +5%, Govt: Star Federation = E +30%)
Massive Scale Building (Ships: Star Condor)
Reinforced Hull Design (HP: +10) -> Harden Hull Design (HP: +10)
Expert Logistics (+12 now 36) -> Ultimate Logistics (+15 now 51)
Stole: Phasors V
Stole: Space Mining III
Supreme Planetary Defense
Stole: Quantum Driver
Stole: Black Hole Gun
Stole: Singularity Driver
Stole: Mass Drivers
Stole: Graviton Driver
HyperWarp (Speed +1)
Stole: Neutrino Bullets
HyperWarp II -> HyperWarp III
Supreme Miniturization (+25%, Ship: Star Condors II)
Industrial Sector (PI: Industrial Sector, E. Starbase Module: Orbital Replicators [MP/SP/RP +3%], M. Starbase Module: Resource Sector +5%)
Xeno Farm Construction II
2229-07-22 Influence victory!
I could have easily taken out the Altarian Resistance to win an Alliance Victory since I was allied with the Korath Clan.
Or I could have taken out the Altarian Resistance and Korath Clan for a Military Victory.