I'm level 50. These are the builds I use:

For pvp, I use a bow: venom arrow, breath of life, magnum shot, binding javelin, reflective light, nova. This build has crazy utility, you could probably switch out magnum shot for eclipse to protect yourself against casters. Binding javelin and reflective light should do the trick for melee ppl anyway.

I use medium armor and stack crit but do 3:1 magicka/stamina for attribute distribution. I tend to look for hp & stamina for my medium armor attributes. My magicka regen is always overcharged and using magicka food overcharges my magicka pool also so I prefer to stack stamina and throw in some hp just so I'm not so flimsy.

My 2h AOE PVE build is: biting jabs, repentance, stampede, brawler, breath of life, cresent sweep. Make sure you put points into the burning light passive because it adds a lot of dps. Repentance makes you a never ending grind machine if you're solo. If you're playing dps in a group than you could switch it out for whatever, but restoring focus (rune focus morph) would be really good. Gives you and your front line melee'ers a ton of defense and boosts healing effects from the healer.

A crit build isn't very useful for this setup so I suggest going for heavy armor instead, that way you'll be fairly tanky and can focus more on dps skills than defensive skills.

I recommend buying 2 warlock rings and a warlock amulet. The set bonus is insanely good and helps keep your magicka up. You instantly regen 1/3 of your magicka when your magicka drops under 33% and the cd is only 1 minute. Between this set bonus and repentance, I never run out of magicka/stamina/hp when grinding monsters.

DW is the next build I'm trying out so I can't comment yet on that. I'll probably keep it the same as my 2h build but swap out the 2 2h skills I use for DW skills instead. Maybe switch back to medium armor also.