Stones
Life stone + elemental stone. Currently, you can’t put a life stone because of a bug.

Gloves
Green stats
Don’t really matter, maybe accuracy, but not sure. Well, it can’t be bad anyway.
Stones
You can put block stones for PvE, and for PvP you have the choice : accuracy stones to increase your attack rate (however, accuracy seems to work only with normal attacks…), or elemental stones

Helmet
Green stats
Try to get an “all stats +n” one. All stats +6 is what you’re looking for. You can have all elemental resistance +n with this too.
Stones
Put an elemental stone in there

Grinding
I put this section before the skills section, so you understand the importance of each type of skill.
At first, you will be attacking single targets. Kill a mob, run to another, kill it, etc.
When you get archlord gold, you will switch to another tactic : run to a mob, hit it once with a normal attack, un to another mob, hit it once, etc until you have a proper number of mobs running after you (you will have to determine this number yourelf, basically you need to gather as many mobs as possible without dying when then hit you). That’s what we call a train. Then hit the train with an AoE. They hit you at the same time, so you have to run until your health is back, then hit them again with an aoE, until they’re all dead. I recommend this strategy to start with. After some level up, you will be able to gather mobs by using an AoE, and make a continuous train.
Grinding like this is faster than kill single targets, and it costs less (you will find son enough that repairing your gear can be expensive)
Depending on you using chantra (lens stones to reduce cooldown) or not, and also how how you feel comfortable, you will use 2 to 4 AoE combat skills to grind efficiently. It's up t your grinding style, you will figure it out only by playing.