no, BST is pretty mucg stuck with WHM sub solo if you wanna chain, i have a 75 BST friend and i come PL him sometimes when we lose XP in stuf flike dynamis and such. Most of the time a BST will duo with another. I dont know what lvl the ability is but BST have the ability to release their pets before they kill the mob so the pets they charm dont absorb XP. The way i have seen most BST do it is they will let their pets atack for a couple mins and then join in and let the pets tank, they will build up TP till the mob is almost dead, release their pets, and then use a WS chain to kill the mob, cure up and go again, since they released their pets, they dont absorb XP and just the Beastmasters get the Awesome XP, while i sit back and cure em.......