I may need to go to a lower resistance, when i use power mode on the mvp it always tastes burnt even on the lowest 6w mode. most of my coils are 2.2-2.8 Ohms.
If you are using your MVP in wattage mode, going to a lower resistance should, in theory, make little difference.
I'd suggest you have something else going on here - either it's not delivering the power it says it is, or more likely, you have a wicking problem.
You can try opening up your protank and dropping a few drops of eliquid directly on the coils, then vape it at 6W as normal. If it still tastes burnt, the problem is with the MVP ( I suppose it could be the coil or the juice just thinking about it), if it tastes OK, the issue is wicking.
Are you using a particularly thick juice?