[Sir_Dr_D]

Communions are usually only usefull to
1) have the master cast spells he doesn't have the path levels to cast normally. This is usefull for battlefield wide spells such as flaming arrows, or arrow fend.
2) Boost your slaves with self buffs in a reverse comunion strategy. Good buffs to have the master cast include power of the spheres, summon earth power and eagle eyes. The slaves would then get the same buffs.


But in almost all cases , you want your communion behind an army.