Help with best Lab/A4 Rusher-Build

Hey guys,

For the Legacy league, I would like to play a build which is best for rushing 5 other players through labs and also Act 4. I want to be able to get through a lab in under 15 minutes and kill Izaro while 5 other players wait outside.

Now, from the little I do know is the traps do 25% of your eHP no matter what. The only thing that mitigates trap dmg is Fortify. So I was thinking a good place to start would be Champion, since you have permanent Fortify (you don't need monsters around).

Next I was thinking, to make the character very tanky since I will be fighting bosses on 6-man HP, but solo. So for that I was thinking I would need a shield, to take advantage of Block.

So with those two things in mind, I was thinking the best thing to do would be to play Facebreaker, Shield Charge Champion. And for single target I could use warchief toters. Anyone care to comment or give any advice on this? Thanks.