Auto-translated
I can't say anything definitive about multiplayer, as it doesn't interest me. For single-player, the first two options (resurrection in water and explosion in fire) are somewhat imaginable, but there isn't much point to them. On good maps, water magic is already a must-have, and moving the explosion to fire won't significantly increase the value of this school of magic; it already has Armageddon. The suggestion about blindness is very strange. Strengthening one of the most overpowered spells in the game (perhaps only surpassed by slow and berserk) is clearly not the best way to improve fire magic.