Pro Hurricane Tour 1.35 is my choice, I find it the most balanced string in the Steam along with 4g. Playability-wise Cyclone 1.30 is my favourite, but dies quickly, Tourbite was a let down here, too launchy and mediocre feel. Black widow 1.31 lasted me just 20 min, and may become too mushy in the Steam. Black shark could be a nice option too, but just lasted one set. With PHT I get 5-6 hours , which is somehow acceptable for me, given that the performance is quite consistent.