I am desperate, I have tried to find anything I could but everyone is just complaint topics from December when they added in PVP and everyone quit doing PVP.

Is there any tips on how a BLM can get not instant OBLITERATED in pvp?

I am Rank 16 full 70 pvp gear/acc and full twink 40 w/ quad materia.
I live a little longer in 40s because of 1handed weapon + shield/parry.

I already usually do barely any DPS compared to other DPS and Marauders due to only casting Sleep when I have a chance to cast and Scathe when running away.
I can run as a THM and pull the skill the +20% DEF skill, but that hardly helps.

I notice I never tend to fight against BLMs, assume due to reasons I am said.

Any tips or are we just utter trash until this 2.28 patch which said it buffs BLMs (hopefully for PVP)?