It’s full-on invincibility from the front, AND potentially massive damage, with aim-assist, and that’s without any upgrades.
Anyway, Phalanx is good too but I’ll just go ahead and hype Ceraunic storm, the best goddam skill tree in borderlands history. Maelstrom stacks are nice, but you don’t need to completely rely on them in normal, or even true vault hunter mode, you get a massive mag size AND reload speed buff, and in general, a great selection of offensive AND a great defensive perk in the form of Conduit
Try a tesla grenade for stacks, and don’t forget to get Zeus’s Rage. A lot of people stop at smite, and sneer at Hades’ Shackles, me, I can’t let it go. It’s great, especially if you have trouble building stacks, which is mostly what it’s good for (the damage is indeed mediocre, although it’s free shield stripping)
Xiphos is neat too, but it’s best to just respec into it once you can get bloodrush. It was my plan originally but CS converted me