The thing that kills you in raids is not melee it's range dps. Hunter bubble will let you get away from reavers easy while BA-s will still get you down. Not much you can do either. Only thing you could try is picking your spot start of fight so you have LOS options. Tho you most likely will LOS yourself from your healer aswell. Also recommend staying at max range (40m) from the target you are attacking. So you can move out of range quick when you are focused. I don't recommend getting started with gearswapping at all now. Also trying out a more tanky build in general is a good option when you get targeted a lot.
Just food for thought. You might find hunter forum way more useful for this kind of discussion tho.
argio r11 burglar | trytofarmme r10 reaver | trytoloveme r10 spider | ikissedafreep r10 blackarrow | roargh r9 warleader | trytocatchme r9 warg |