1) I'd say RAAM skorge can probably be quick and avoid him for a bit but once RAAM gets hold of him it's done.
2) RAAM, Marcus managed to take down Skorge with a gatling gun on one of those things it was going all over the place, the Brumak should prove as a stable enough surface to gun down the hydra.
3) could go either way, probably in Skorge's favor he's quick and can get in some fatal hits on RAAM but if RAAM can grab him he can f skorge up.
4)RAAM skorge has little gun experience from what I can tell.