Drive-by HS -> Maim is better than Flashing as it allows you to get Maim up as soon as you're able to. You shouldn't be low enough on TP to need to Flash for picking up packs.

You also don't want to start with HS->Maim once everything is together, you want to start with Overpower and if Maim isn't already up you would do Maim after you've established AOE aggro.

Infuriate also shouldn't be back up within the same pull, even if you activate it as soon as possible, you have 25-30s (can't remember what the number is) before 5 Wrath completely wears off, and then 30-35s before Infuriate is back up. It won't be up two times unless your group's AOE DPS is incredibly low.

Another thing to note is you can activate Thrill + Conv and turn off Defiance in place of using Unchained when it's not available, after you've used your 5 Wrath on a Steel Cyclone. This also works for any pack that can be stunned without Thrill or Conv up, because you won't be taking damage while things are stunned.

Infuriate -> HS -> Maim (drive-by) -> Unchained + Berserk (as you're approaching your stop point) -> OP -> Vengeance + IR -> OP -> Bloodbath -> OP spam

Alternatively:

Infuriate -> HS -> Maim (drive-by) -> Berserk + IR (as you're approaching your stop point) -> SC -> Thrill + Conv + Defiance off -> OP -> Bloodbath -> OP x inf

That's really just min/maxing your AOE DPS, though. As long as you get all your buffs up while spamming OP then you're fine.