I find that doing mp0 for tempest rush still the most effective cause you can't kill the mobs fast enough in mp1, you basically just want to run through them and trash mobs should die, unless your gear is really good and can do the same in mp1, why not

While you're doing the tempest rush build, you don't attack stuff, just run through them with tempest rush, and depending on how much crit you have, you either go for fire storm rune or cyclone. Also dual wielding means you need to have more spirit regeneration cause it drains much faster if you have higher attack speed, aka if you have 1.34 attack speed it will drain about 12/13 spirit per second.

What I do now is use Deadly Reach : Foresight rune to get the damage buff, then cast blind and then use the sweeping winds snapshot, most mobs die when I run through them, and use seven sided strike on elites to 1 shot them.

2nd WKL looks better due toe more lightning damage and higher dps, the 10 dex and 0.3% lifesteal is not a huge deal compared to the dps and extra lightning damage

damage range isn't that huge, since the 2nd wkl has better average damage