Just got into TVHM last night on level 36.
During the final fights in NVHM, I found mobs more dangerous than those (mini) bosses: Saturn died after one rocket shot. Bunker lasted a bit longer but rocket spamming worked fairly well. And the Warrior just keep swimming in lava without causing real damage.
(Well I still died in Vault of Warrior once because I didn’t run fast enough when lava rised)
But I constantly got killed by various loaders in Frystone and Hero Pass - the shield is suddenly depleted and then I was in FFYL I have no idea what happened…
Here’s my build so far (mostly following Cykotr0n’s The Shocking B!tch): http://bl2skills.com/mechromancer.html#512050100000050000000000411050100000