Tips: regeneration will help always a lot if you play with intervention and supression. You'll be almost immune. Also give veradux the while paladin set, so he can poison enemies dealing 400-600 atk.
Dr Herregods will be defeated if you play subversion on him when he heals for 99% ;)
I can say that I would prefer lower money cost of too expensive units like thunder crystal, reaper etc. and also having a chance to buy with money the things that cost crystal to get, also I would low the cost of ???potion, exilir, faatality drink and dino steak barbecue