he wasnt really decked out with items or anything, we had really strong magic phases almost every round which contributed 7-12 dice usually which is definitely above average.
he had a lvl 4 vs my 2 lvl 2s (one was the stigyosaur(love that guy!) and a little lvl 2 of heavens with my scroll)
basically he would cast 2 spells a turn say he gets 9 dice, he would 4 dice cursed blades bubble basically guaranteed to get it, everyone heals and gets kb the spell is only a 10+ in the bubble version, knowing i would have to save my 5 dice to dispell smiting or risk getting double tapped from his whole army, one turn i scrolled it, but every other turn he was getting both spells.
this was at 1500 so in a 2500 pt game could probably use more defensive items.
the big trouble maker was the casket tho since its shooting now you cant defend against it killed my stygiosaur and steg by turn 4 with one or two wounds from his other shooting. over the course of the game i think i pumped 5 wounds into it focusing all shooting on it that could reach it, but it never had more than 2 on it at a time.
again at the end it was a draw so not really broken op or anything that was just the stuff that it didnt seem like there was effective counter-play for.