Guild Wars 2

I want to know which set should I buy and also which runes and sigils to go with it.

Marauder’s armor (Power, Precision, Ferocity & Vitality), Berserker + Valkyrie Trinkets, Rune of the Scholar, Sigil of Air and Sigil of Force (or Bloodlust but you need to keep those 25 stacks up for optimum damage and in some cases you might not get the chance). Great damage output + extra survivability.

The extra vitality not only gives you extra survivability but, as your Life Force pool is dependent on health, you gain a bigger Life Force pool. While the decay is % not a static number, this comes in handy for when you wanna use Shroud as a shield.

To get better help, you should mention for which game mode you want a build. PvP/WvW/PvE? You could also check out metabattle.com for example.

If you’re going for optimal dps; I would recommend zerk with scholar runes, and use sigils of force and air. Feel free to replace as much of the zerk with valk if you take decimate defenses and death perception. Keep in mind that decimate requires you to stack and keep 25 voun on your target to get that 50% crit, and death perception only works in shroud, which is a dps loss.

If you just want to face tank everything; you can try the 100% crit chance caval minion master. It’s by no means optimal but I personally found it to be fun, I believe I used something like this: http://gw2skills.net/editor/?vRAQNBHhF6khGodTsbTwyGg9GsMNYSDgCQAI+DmCfhUxgbQmC-TxRBQBJSfgB3fAAPBAPp+zDOFAoRJYXU+BA-e

I want to know about PvE or strong builds for raid and some end game features.

You’re going to be hard pressed to get into raids as a power necro. Your dps, at best, is equal to that of a ps war, but you don’t offer as much buffs as they do. You might be able to get in high level fractals as a power necro, depending on how well you know the instance. As for open world pve and low level fractals, you can run anything you want for the most part.

Also what is zerker ?

PhilipKsL.9167:

Also what is zerker ?

berserker, its one of the stat combinations on armor.