[Stagger Lee]

Originally Posted by Legendary League

You're forgetting the most important spell for communion, Reinvigoration. Removes all fatigue from a communion, all fatigue, which is absolutely awesome. It's a blood spell, however, so remember that (so if you have a blood mage that can enter a communion via sabbath, do it).

Works especially well with reverse communions, where the goal is buffing your slaves with PotS and other spells so they can all cast evocations. If you're say Bogsrus, form a reverse communion with as many A2S1 guys that you can (since it's Bogarus, 30+ mage communions are fairly easy to make), have couple masters (at the end of the turn order, since if a master casts before a slave, the slave won't cast [I learned this the hard way, hahah]) cast buffs from Mistform to PotS to Earthpower to whatever battlefield spells you need (Flaming Arrows, whatever), and script reinvigoration in alternation on Diabloists or Starets (because reinvig needs master fatigue to cast). Watch as you rain dozens of thunderstrikes, Gifts, Falling Fire, Magma Eruptions, Astral Fires, whatever you desire, and decimate the enemy army, all with pretty much nonexistent fatigue.

Yes, but experience has shown this to be hard to rely on. Battlefield placement is far more important when blood is involved. A nearby master might just grab a few slaves meant for someone else, screwing up lots of well laid plans. Also, the fatigue on the master casting reinvig, iirc the fatigue has to be significant, or it may go off script.

Originally Posted by Immaculate

Don't forget the value of combinations like 'resist fire', 'flame storm', or 'resist poison', 'foul vapors'. Suddenly all your casters share the elemental immunity that their troops presumably possess (summon lots of firesnakes for example) THEN drop the big thunderstrikes or whatever.

Perhaps nitpicking, but not all casters, rather all slaves and the master casting the spell. Other masters will have to hit themselves or buff with items.