Titan-Egi can tank duty bosses.
I just did a run where the tank let me use Titan to tank all the bosses. And it worked really well. The egi never lost agro and it generally really fun to do. However I have yet to try out doing it on trash mobs. Since it has weak AOE agro, I dont think that may work out unless you alternate basic attacks between each mob and spam his spin.
Mehhhhhhhhhhhh diva tanks!
Me and my wife qued Halatali HM last night: me on smn (110) and her on Whm. the dungeon seemed to start out fine. We loaded in with a pld and drg. Well the pld starts pulling stuff, as in only the first set of mobs. Now understand, my wife is used to healing my WAR on speed runs and so she suggested he could pull more mobs at once since it was late and we wanted to get the dungeon done soonish. So the pld just leaves the duty... Guess he thought he was teaching us a lesson. Well I take Titan out and pull two groups forgetting my enkindle was on CD. we wipe once, the drg bails on us and another one ques, a first timer. At this point I've about had it with the luck so far. So we proceeded to run the rest of the dungeon this time with proper care. You know things went pretty smooth and Titan tanked everything in there like a boss! Sad to say that pld that left had pretty good gear but Titans balls were bigger than his ego, you weren't missed mister diva tank!