Waylan's current bow (+1 magic, +1 Str) is better for him than the +3 str composite longbow, so he will pass on that.

He'll claim the MW heavy mace as a backup weapon and the arrows, of course.

The breastplate would hinder his Max Dex, so he'll pass on it. The +1 chain shirt would be a straight upgrade for Waylan, but priority should go to Filburn if he wants it. Similarly the +1 cloak is always beneficial, but Waylan has solid saves already and someone else could probably benefit more from it.