You only need as much regen as is necessary for your task. Start dropping your regen for damage until you run into resource issues, then bring it back up until you reach your optimal level.
You can run fine with infinite sustain single target with around 700-800 regen, which is the standard amount.
Go dw and bow, make sure weapons are gold and equipment is v16 (preferably all gold also).
You can do fine in pvp with pve set up, you wont be the best - but its just a simple matter of changing some morphs and having a different set of gear if you so choose to even go that far.
Make sure your dps ultimate to drop is standard. That will restore a huge amount of your resources, light attack weave often for dps + ult gain, and you will be fine.
PC/NA/AD
Queen Ella - Mag DK - Tank/Healer/DPS Dunmer DK Cant Even - Stam DK - DPS/Tank Im bad at healing - Mag Templar - DPS/Healer Tangy Citrus - NB - Mistake