Summon cultist and free cultists runes now give cultists less damage

Damage scales downward with each additional cultists around the rune.

No more automatic 15 damage for freedom then 25 for summoning even if you have 8 cultists helping with the ritual.
Merge pull request #5949 from Ccomp5950/cult-tele

Summon cultist and free cultists runes now give cultists less damage