Connecting the DoTs: A Summoner Guide

[Takaokami]

Are there any guides on PVP skills? Which ones should we spend exp on first? Which ones are useless and so on...?

[Cherub]

Are there any guides on PVP skills? Which ones should we spend exp on first? Which ones are useless and so on...?

Wither is the most important one. You get both upgrades for it.
Aetheric Burst you'll want the CD cut, the SS reduction and Extended debuff duration isn't what you're going for so you pass on them unless you really want them.
Mystic veil you get the third Upgrade. In 4vs4 you also get the first upgrade for safety purposes and cutting the healers range or the casters/rangeds range. The second upgrade isn't needed.
In 4vs4 you get equanimity fully. In seal rock you pass on them.
In 4vs4 you get mana draws second upgrade for more Ruin III spam. Might wanna put 4 points less into equanimity and cut CD of mana draw with that instead. Up to you.
Purify is an absolute must.
If you have anything left, VIT trait.
If VIT is full and you still got points left, INT.

In seal rock I only get mystic veils third upgrade, purify, aetheric bursts CD cut and both wither upgrades. The rest goes into VIT and INT.