I use BH in level 90 heroics for some bosses with AOE stuff. I found it useful. Selfless healer is not that great. I can't watch for the proc and stop DPS to heal brings more damage intake. in PVP, selfless healer takes way too long to build up. BM hunter would've killed me twice already by the time I can instant flash of light. So I just stick with sacred shield for now.