This is a valid 2 man across strategy. The cheese is the thrall de-spawn. No biggie.
Edit: Here is an Abyss and Bridge SOLO TITAN (Post Patch) as well.
http://youtu.be/yCrpbO4zhqE
http://youtu.be/tCziRBoyXQY
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My group said "Ok lets just do it legit" we had one guy over and he was low so we just shot everything and ended killing the ogres and bam we got it. So we tried to do it legit and I guess you could say ended up cheesing it?