That is different, I have done Tank serris/Mal'Damba because my tanks were convinced they were flanks or something. I am talking the ones who choose healers with no intention of ever focusing heals because they think they are some dmg/flank god. You want to do that fine, but let your team know so we can grab a proper healer who will do their job. That said I understand as a healer/tank main the pain of the tanks running off to play flank or dmg, I have had matches where my Pocketing healer(Only pocketed me because I was the only one nearby and I was keeping them safe.) and I both had over 200 obj time and the other tank had 1 obj time.