I've done 18 toy bird. Worked a treat vs bears. Failed like **** vs mages.

& idk whether its just how I use to play but jeez your comboes seem so crazy...
hippoes usually heal out root & seeing as he was running away from you & you were rooting to get away. Why not use root so you can stack break. My combo would've been repulse (when he charges) root, (wait for heal) break shatter (DO NOT BLAST FOR 4 SECONDS SO THAT YOUR -4 SHATTER DEBUFF STACKS WITH BREAK, & he'll be dead from then.