Quote:ADDITION:
if you use the Holocron's FP to cast a force power, can you still use force points from Eternal Sith Spirit? or Dark Nexus? or both?
This gets tricky... have to keep track of how many times you spend Force, which Force pools you spend from, how many times you spend from each one, and in what combination.
Default, of course, is: Spend 1 time from only 1 pool: your own.
Holocron lets you spend the Holocron's Force points on Holocron Force powers (but cannot spend their own Force points in the same turn). It doesn't affect how many times you can spend Force points.
Dark Nexus and Eternal Sith Spirit each let you spend its Force points once and your own Force points once per turn.
Master of the Force allows you to spend Force points multiple times without specifying the Force pool.
So suppose you spend Dark Nexus Force points. Dark Nexus itself only lets you spend Dark Nexus + your own Force points. So Dark Nexus isn't going to let you spend Force points again from the Holocron. But it also doesn't prohibit it. Holocron only says you can't spend your own Force points that turn - it doesn't say you can't spend Dark Nexus' Force points. You can't normally spend Force points more than once and Dark Nexus doesn't help here, so you would have to have Master of the Force 2 naturally in order to spend Force points from both the Dark Nexus and the Holocron.
The same logic applies to Eternal Sith Spirit.
Spending from all 3 - that would require Master of the Force 3 to be able to spend 3 times. You can't spend from Nexus or Eternal Sith Spirit more than once in the same turn in any case.
That's the way I read it, but I may have made a mistake somewhere up there.