That’s not a bad setup overall. Once you have full impen, you should see your survivability go up a bit. One thing I will say, though, is that you’re lacking significantly in magicka regen; regen is very important in no-CP PVP, unless you’re playing a gankblade. Remember, you don’t have CP to help with sustain or max magicka. I would recommend swapping Rattlecage out for a magicka sustain set — especially while you’re still learning the ropes. You can gain Major Sorcery through other sources (trash Alliance spell pots, which you can get from the merchant at the BG quest giver hub, are a cheap option). Bright Throat’s Boast is excellent for no-CP sustain, and you can boost your max stats if you pair it with the spring-loaded infusion drink. Also, if you’re using BSW, you only need to front-bar it. If you don’t have a BSW inferno staff, then I have to warn you it’s a bit of a grind...worth it, though, as you can back-bar an arena weapon. BRP resto staff (which drops in normal BRP — you don’t need the perfected version from vet BRP unless you really want it) is a good backbar option; Ward Ally will help with your survivability, and the BRP resto staff buffs that skill up significantly. With the better sustain you’ll get from dropping Rattlecage, you can get rid of Meditate and slot in Ward Ally instead. Healing Ward is also getting buffed next patch, so that’s an alternative (Ward Ally is more reliable for your own protection though, as you’ll always get a shield — Healing Ward will only target you if you have the lowest health compared to your group mates).
As for the difficulty you’re having with gap closing to ranged opponents, one thing I could recommend using is Empowering Chains (the morph that pulls you to the enemy). Chains + Fossilize is a good combo, because that morph of chains does not give the enemy CC immunity. I used to use that on my magDK back when I still ran BGs on that character, and it was very effective.
Anyway, keep at it. You’re only three days in, and PVP in ESO has a steep learning curve. You could always try magsorc as well if you’re finding magDK too difficult. Melee range mag classes are tougher to master in PVP than ranged classes. Magsorcs also have an easier burst combo (for DKs, which primarily deal dot-based damage, burst is largely reliant on Leap, which you don’t always have access to).
You should ask NirnStorm what he use for BG. Your setup is the same as him and he's really good with in Cyro.
You should ask NirnStorm what he use for BG. Your setup is the same as him and he's really good with in Cyro.