Which Girls would be their comrades? If you don't have any Slice Girl in the final team Protea would definetely be better since Weakness Damage and Crit are much better than a simple Atk/Damage Boost.

If you already have 2+Slice Girls in that team it greatly diminishes Protea's usefullness.

60% Chance to Attack again is n1 though and if it procs it would outshine Pickerel's Damage.