I just got Entrenchment, and have a few questions. I only play single player. I know these are basic questions, but help wiould be appreciated.
1. Where in a gravity well is it best to locate a Starbase? Should it be closer to the planet, to try to protect structures/and the planet? Or is it better to have it out at the edge by a phase lane? How close does it have to be to a phase lane to disrupt it?
I think the answer might have to be: "it depends" -- on how you develop the starbase, and on the strategic situation.
A starbase that is heavy on strikecraft and light on direct weaponry / abilities should be far from the attackers, for instance. An Advent starbase with max'd confusion / meteor-smackdown abilities, both of which appear to affect all targets within a given radius, and with the armor upgrades to survive, might want to be in the thick of the fight.
Setting up very close to a phase line, surrounded by mines, repair stations, and beam platforms would mean you'd be immediately engaging arrivals. They'd have little time to quietly clear the mines or to attempt to go around you for easier prety, or to pick off your structures from long range. On the other hand, if the attackers is heavy on short-range firepower and abilities instead of carriers and long-range anti-structure ships...
In addition, if there are multiple ways in (and against a Vasari player with a Kostura in the same system, there *is* another way in), well... unless it's a star, you can only place on starbase. And even starbase weaponry has limited range.
Oh, and regarding the phase line disruption: It doesn't matter. Anywhere in the gravity well is fine, as far as I can tell.