Considered flashing bios to, but i can't afford to replace the card atm. Here's what i've read/found so far;
+38mv should be your max if you're staying with air cooling.
push the thermal threshold to max and prioritise it, then push power target to max.
Set a custom fan curve, more aggressive (louder to) gets lower temps.
Bump up the core clock and mem clock until you get crashes, then back down some.
Example, my settings hope some of this helps.