WAAAGH! Gazkull ork allies with wych cult list

Ok so I play 40k for fun not competition so my opponents r good with me bending the rules a little (like a drop pod with burnas in it) so far I've ben running that and lootas as fire support but I recantly got WAAAGH ghazkul and am loving the green tide formation the only problem is that the orks have to footslog and ya know dark eldar =rly frak fast so the green tide doesn't get to krump any gits any suggestions