Looks pretty good, no cloak can work but cloak is a really good skill... also I think you should have Vigor somewhere. Usually you want one bar be the fighting bar, and one bar be the buffing bar, so maybe:
Main (DW)
Mass Hysteria
Ambush
Surprise Attack
Cloak
Shuffle (for snare immunity)
Flawless (8% weapon damage) OR Soul Harvest (20% more dmg for 6 sec and defile)
2H:
Rally
Shadow Image
Relentless Focus
Vigor
Piercing Mark
Ult: Any utility ultimate (soul tether, meteor, werewolf)
Feel free to swap stuff around, you can tell which are the utility skills and which are the fighting skills.
Also next patch killer's blade will be good because they're changing it to disease damage, but currently I don't like that it does magic damage so I don't use it. For executes, the 2H Executioner or Bow Poison Injection are reasonable. The Incapacitating Strike morph of Death Stroke will be better as well because of disease damage and they made the stun guaranteed.
Having ~20k HP is generally fine within Cyrodiil, just have to know how to break LOS and know how to mitigate whatever's coming to you.
I feel like to even begin to get good at PvP you need v16 gold gear (gold weapons at minimum gives ~10% damage boost, gold armor is like a ~3% boost?) and max CP, so if you are lacking in CP I'd suggest going to the non-CP server, or go with a zerg because you're not winning 1v1s vs someone who has max CP if you have like 300.
Also if you want to run at max capacity you want to have some combo of health, stam, cc immunity, speed, and maybe detect potions. I don't use them because they're expensive, don't want to spend so much gold just for pvp.
Also focus on stam recovery for PvP, use that health/stam regen food from Orsinium, or get the serpent mundus buff. Having at least 2k stam regen allow you to fight much easier.