i went with /elec. you get 20% recharge passive, 50% end reduction on everything and ALSO a fill your end bar clicky. solves a lot of the shortcomings of TW. overall the set is a monster if you disregard momentum. constant knockup, tons of AoE and insane single target damage, a defense buff, resistance & defense debuffs.
the problem is dealing with momentum. the damage of the set during momentum is awesome. getting momentum is a problem often times. you dont get momentum when you hit absorb bubbles (even if it is a successful hit). you dont get momentum on a miss (which feels REALLY awful) -- that said, chain misses are absolutely disgusting. outside of build momentum clicky, the standard momentum window feels so short. and one of the biggest issues surrounding this is maximizing your attack windows during momentum. anytime you need to press buttons not related to momentum during your window it feels REALLY bad.
all that in mind, playing in parties is often very awkward. you might as well not do anything if you dont have build momentum active because by the time you finish swinging, whatever you tried to hit will be dead and your momentum will be half gone by the time you get to the next target and then you'll have to get momentum AGAIN. overall an extremely strong set limited by an extremely frustrating momentum mechanic.
as an aside, i dont know if its a bug... but pretty much every attack in the kit has a delayed aspect to it. skills swing around, make sound effects etc, and then it actually does the damage/knockups 1 second later. im not sure why because it doesnt lineup at all with whats happening visually but it can often feel bad if you were spamming a knockup skill as you die and then the mob gets knocked up right after you die.