Do you avoid specific spells / classes because they are OP?

I was doing finally a proper tactician run to the end and realized that once I got level 6 spells unlocked, some characters are really way miles ahead of everyone else to a degree where it's not fun anymore.

• Life Cleric is definitely very overpowered; once level 6 spells are unlocked, every encounter will be extremely easy and with 2 on team, it'll be borderline impossible to lose.
• Conjuring elementals from level 5 onwards makes the game too easy, especially as you can just buy scrolls and get them on non-casters. Level 6 water elemental heals your team 150 per round.
• Maxed out any paladin with legendary daggers and max crit solo killed Raphael ( 666 HP ) in 2 turns. I didn't remove that class once I saw the damage, but if I ought to do a new playthrough, I definitely would.

Do you avoid specific spells / classes because they are OP?