hey guys i play the sbg and as you may already know you can use mauhur in the game system (the rules where in last months white dwarf) and this army seems cool but im not to sure how to theme it. there will be lots of uruk scouts but not sure what else to get any feed back welcome.

Well, it depends on what theme you want. If you want to theme after the group that captured Merry and Pippin, then add in Ugluk, Grishnak, some Mordor Orcs and some Goblins. If you want to theme after the small band that Mauhur lead himself, then just use Uruk-hai Scouts (and possibly throw in some Feral Uruk-hai if you're that way inclined)

I don't know what I think about GW's direction of saying that Mauhur's band was faster than the rest of the Uruks and Lurtz but I suppose I can live with it.
But yes, it's a good theme. You can add Goblins for extra numbers that Uruks lack but you'll have to watch your weaker defence. Mordor Orcs can be themed without, they joined the group late, and then left again before rejoining etc. though it'll look better if you can find the points. If you're sticking to theme, then you'll just have infantry, but if you're going for the raider feel in general, before the attack or if Mauhur survived (maybe he reported the attack to Saruman himself instead of joining in the rescue attack), then Wargs could be slotted in.
But you have plenty of heroes to choose from. 4 Uruks (1 of which you've already agreed to take) and Grishnahk

wargs are a good idea and now that you can get a box of wild wargs i may do it, kind of a "release the hounds" moment.