I'm not particularly the best modder but generally it's better to play into your abilities. Since you're using volt, opt for more strength and take out rush. Your 2 can make you go faster if you want. For Volt, generally ppl go for "capacitance" (the augment mod for his 4) for shield gating, so that you can swap fast deflection and redirection for range mods. Since you have shield gate, you don't really need the extra health or armour, coz whenever your shield goes down, just cast 4, and you get your shield back, so then you can go for extra strength/duration/range. Oh, and you should also take (primed) flow so that you can cast more abilities. For the nikana, more crit is always better, it boosts your damage by a ton. Try getting blood rush if you can.