Why do people care about this? It was widely know to be a strategy everyone was talking about before ToO came out. Day one me and my team were looking at what the opponents were using and if their was a sunsinger then you knew their was self res. Everyone counters it with standing on ghosts ready to shotgun melee or just kept their distance from the dead warlocks to drop them as a team. Literally if you die to this then you just aren't as good as you like to believe. The only time I've seen it be viable is if the whole enemy team does it at once and even the while it happens you can drop one for sure while creating distance from the others because moat sunslinger forget they have guns and just try to melee grenade spam. Also you can shut it down with titan slams, novas, golden guns, or multiple supers of you have them.