yeah i found many situations like this
ai at this stage REALLY overvalues buffs and debuffs
most fights AI lose just cause even if in good shape it waste lots of turns to cast useless crap slow and stoneskin and curse and stuff
and when it actually start attacking i already halved their army with fireball and dmg spells
well this would deserve another topic i think anyway its not about ranged vs melee i think with the actual meta with lots of mana and all champions casting buffs and debuffs are quite useless
since at any point in 2 turns with 4 champions you can totally rape an army there is no point in wasting time to cast debuffs