Here, have this explanation I wrote at like 12am when I was wiping the floor with her enemies. (Note: I gave her a Human Head, so she also had an omniboost on top of the base stats I posted above. I forgot to clarify that here because I couldn't remember whether I'd given that omniboost to her or the Cleric I brought along.)
so, this is Pinkie
she is the first Druid I ever got
ironically I was very worried about her sucking because of the substantial stat decreases that Druid forces
(there was no need to worry about this)
her Feral passive (upgraded) gives her three substantial, permanent stat boosts
her elk form gives her crazy stat boosts, specifically oriented towards speed and taking away from Pinkie's best and worst stats respectively (intelligence and constitution)
the Invert ability she inherited allows her to swap the stat boosts she was already given, specifically her weakest and strongest
her strongest stat in this form is generally Speed, so good that it lets her cover the entire map
her weakest stat is constitution

so when she goes to elk form and swaps her stats, she basically becomes an unkillable monster
and because the rest of her stats are still fucking stellar, she just becomes able to cover half the map instead of all of it
for reference, her current stats in elk form (post-inversion) are:
13 strength
8 dexterity
20 constitution
11 speed
13 intelligence
12 charisma
8 luck
she is simultaneously shitting all over mama maggot and guillotina without taking any damage save for that incurred by her tripled health bar
god I love her so much