That depends on the Spell or Effect that will trigger. If only one of those types (damage, status effect, whatnot) triggers then it should not be a problem.
I think it would be funny for a druid to be able to shapeshift himself or others.
Something like:
"Werbear" - target ally gets +X armor but - X Mana - X Spelldamage
"Werboar" - target ally gets +X damage and +X resistance to status effects but -X Mana and -x% Chance to trigger status effects
"Wercat" - target ally gets +X attack and +X dodge but -X Hitpoints and -X Armor
"Werleprechaun" - target ally loses 50% attack, damage, health and armor but gets + X% Resistance to Status Effects, Spell effect damage, chance to trigger status effects and amount of gold looted after the fight
and so on
Ranger could use something like:
"Horizonwalker" - Ranger gets +X% resistance against elemental damage and status effects
"Hunting" - Place a mark on a target, all actions against target recieve +x% attack and damage
"Elemental Arrow" - Ranger shoots an arrow for 50% physical base damage but the arrow deals additional X damage of every element
"Preparation" - As Horizonwalker but for the whole party of allies
"Windwalker" - Ranger gets a bonus on dodge based on his armor rating. the higher his armor rating is, the lower the bonus will be.
"Animalfriends" - Ranger gets a special attack for 80% base damage that has a chance of X % to pin his oponent down (has no action next turn)
Scout might like:
"Found you" - Scout gets firststrike with a special attack against all enemies in the first combat round. Attack does 0% base damage but has a chance of 100% (base without modification/resistances) to stun targets.
"Ambush" - scout gets +20% and +20% attack and damage if he dodged successfully before his next attack
"Herbalist" - For the next 5 rounds, the Scout has the chance to poison his target für x Poisondamage/round. He can cure a poisoned ally instead of attacking.
"Shadowstep" - get +100% dodge against next attack
"Hunter" - party gets +x% attack, damage, spelleffect chance or spell damage