Just a quick question for you guys, I was wondering what is better for PVP and PVE KoK or SSJ. Also I was curious as to what good leveling KoK does. Does it make you hit harder or able to hold KoK longer?

For KoK you need a lot of LP and EP cause it drains a lot of it.. but SSJ Is way better cause it drains only EP and increases your stats better than KoK... tho KoK used to be good but its not anymore.. its more usefull for Spiritualists and nameks/majins as well..

Do you know what the point of leveling KoK up to 3/3? Like does it last longer or does it just hit harder?

At level 3 it just makes the drain a bit slower. Aside from crit stuff I like kaioken for pve because it adds like 100 to both your eng & physical attack.

Kaio dmg increase: Lv 1 20 % Lv 2 25 % Lv 30 %
Kaio and SSJ are both good and usefull, you should have both.