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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Hahahahahaha how did they not patch this??!! This was the worst one, as in the most exploitable glitch next to Crota! Wow, just wow, ridiculous, lol.