No. I don't see why?
Only non-trained cards I have used:
Warlord: arcane staple cards (dispel, teleport, maybe seeking dispel or dispel wand)
Priest: [mwcard=MWSTX2FFE01]Adramelech's Touch[/mwcard] for his ability
Druid: [mwcard=MWSTX2FFE02]Akiro's Favor[/mwcard] for the [mwcard=MWSTX1CKC09]Giant Wolf Spider[/mwcard]
Forcemaster: any creature
In the past, I have used healing spells for dark mages, but I don't do that anymore. I use regenerate and the dark healing spells now. Mend is nice for dark mages.