Eikthyr and Moder are the ones I usually have chosen, Eikthyr is great when you need to do alot of running and jumping (fleeing a camp of fulingar for instance) and Moder... well may just be me but when I go sailing it always seems like the wind is always in the wrong direction.

Elder is a grinding buff, you go get it, harvest a bunch of trees and then switch back.

Biomass and Yagluth I have never bothered with ouside of boss fights, Im sure they are usefull but at endgame my deaths are 90% fall damage while building, 8% forgetting I had not eaten and get oneshotted by some hard hitting mob and 2% getting swamped by mobs and getting stuck. The buff is useless in all of those situations anyways.