Celtic Heroes

So I have been casting lure of fire which is maxed then firebolt and firestorm at one point fire bolt does 3.5k then next hit it dies 5k... with firestorm I hit 5k first time next time 8k it's always randome what's up with that

So I recently hit 180 and I've been trying to get all the alchemical vials for my occult armor but I seem to have 50 grand vials and about 8 oor 7 of minor and common ... is it not suppose to be the other way around and if you know a good specific area I can farm em tell me please