Diabolus Robe is good overall. But a set of Elemental Armors is a must, specially for MVP‘ing, so look at it as an investment in the long term.
Surviving Mid TI is a matter of using game mechanics, you can‘t just jump right in in Eden gears. You already have decent gears but there you will be either tanking or pulling that‘s why using racial and elemental defenses to your advantage is a priority. For example, in this Engkanto/Wanderer TI a fellow Sura in my party was surprised I was taking less dmg. I was using a +4 Round Buckler with a Kalitzburg card, which diminished dmg from Demon race (Wanderer)
Players recommended Nogg Road to me since it has narrow walkways for you to cluster the mobs and AoE them, but I was totally wrecked! (To be fair I think I needed more Elemental resistance and I wasn't working in my Racial shields at the time -that's why I'm telling you that Elemental Armors and Racial shields are a long term investment) When I feel ready and geared accordingly I will return there.
You will also need a reliable form of HP recovery in case RWH doesn't procs enough, so try out the Baphomet Costume because of the increased effect as a failsafe.
I'm currently leveling in Rachel Field 05 using the Bounty Board in Lighthalzen. Is easy because it's not mob heavy, so I can find nooks to sit and recover HP/SP, Kobolds have the same type of attacks and belong to the same Race and Element so I don't need extra protection. Just Teleporting around, finding a nice cluster of cute blue furry doggies and BAM!. Rinse and repeat.
Edited by Erydanos, 21 January 2015 - 06:23 AM.