I haven't solo'd it with my titan since my character is only 31. Cant invis like my hunter can from getting slapped/scratched. But, if my strategy from normal can work (spam pulse grenades while using a gun that has grenadier to help restock them) it'll help with getting to the bridge. Pulse grenades and even aftermath with the duration increase perk will keep thralls at bay and then you slaughter some before turning into a bitch and running. Be careful of suicide I'd think of popping a bubble when ogre shows but the problem is having to get it charged. If you change classes at the bridge forming part, then it'll be close. I wouldn't suggest running defender because the spike grenades don't last long enough. Oh and sniper with camo (i swear i can't remember the name all of a sudden) oh yeah, patience and time.