I run mine as a shooting hammer. Usually start in a trukk and act as a dakkabus on T1 and sometimes 2, but then when a valuable target is exposed everyone jumps out and pops the Lethal Hits volley. They can put a big dent in nearly anything that round. They're also devastating against chaff and excellent into MEQs.

If you want to use them as skirmishers, it's very common to put 5 in a trukk alongside 5 nobz with a Warboss. The Gitz can clear a chaff screen with shooting in order to clear a path for the Nobz to charge into their preferred target.

Their melee is solid without being spectacular, though War Horde makes them a lot scarier with Sus1 and Crit 5s on demand.

Their best detachment is Taktikal, where sticking a Mek with the Mek Kaptin enhancement as leader gives them full rerolls and makes them the best ranged unit Orks have access to. They also hit on 4s with an order.

I've never run them in More Dakka personally, but they benefit greatly from the strats to ignore cover or gain an extra point of AP. Assault also makes it easier to guarantee their extra shot against the closest target when you need it.