in short:
1) attack +10/20/30%
2) Bloodbath at level 3
3) Retribution at level 3, or at level 2, but with a leadership requirement
4) Mass Haste should be scrapped and burned with blue flames - want an effective light skill? - then level up light and righteous fury. Because it's not fair to cheat races with dark magic in a city guild - by applying mass slow from dark magic and mass haste from light, we get a very interesting effect - the effect of beating up babies - so go ahead and level up both schools of magic for this, it's all fair - why don't we have mass slow in defense then (by the way, mass stone skin should also be removed from defense)
In general, magic should go with magic, and swords with swords, and magic shouldn't be in purely combat attack and defense skills (a very large period and a hole in the paper from a pen that hit it hard).