Invulnerability makes you so strong you can headbutt three archvillains at once and three more of them will fall like dominos.
Then you run into a psi lieutenant that looks at you funny, and you fall down in a corner, rocking back and forth while mumbling.
Yeah, Nihili's got the right idea. You're golden, and nigh unkillable, against S/L opponents, pretty good against F/C/E/NE enemies, but you become squishy as hell against anything Psi.
As for primaries, it doesn't matter TOO much. The Parry/Divine Avalanche from the sword sets can help you tank a bit. The light endurance cost of claws helps you manage your three/four (CJ, maybe) toggles. Dark Melee has a nice heal, which can help with the fact that you're mostly Resistance over Defense (though you do get a hefty amount of defense). But really, the primary is up to you.
Also, Invuln isn't very good right off. It picks up when you get Unyielding at level 16, and even more so when you get invincibility at 28. Ultimately, you will be quite survivable against most enemies.
The auto powers (aside from Resist Physical Damage) can be put off, but should *probably* be taken eventually. The build, depending on the primary, can be heavy.
I'm thinking of trying an /Ivulnerability. Out of all the secondaries for scrappers i have sort of a general idea of how each one works except this one. Could anyone give me some insight on what its like and possibly what primaries may work best with it?
Thanks in advance