They are looking good so far - I would consider adding another stage of higlighting to the skin just to bring out the contrast a bit more.
One thing I would recommend doing is to use some kind of filler on the gaps on the shoulders where the arms join the body. Its a bit of a pain to do on every model, but I think the ends result is worth it.
If you are looking for something to dirty down the metal a bit I can highly recommend using mig pigments. they are not cheap but give you a lovely worn and rusty finish. If you mix the mig standard rust with black ink and a little water and brush it over the entire area of metal the pigment settles into all the nooks and crannies and gives a really nice finish.
I definatley think ogres need some kind of warpaint to break up the large areas of bare skin. I have always thought the hand prints look cool, but I would be tempted to go for a dark brown colour for the blood to make it look dried rather than the shiny wet blood GW go for. Blood would only look like that for a few minutes before it began to dry and dull down. If you go to coolminiornot and search for blood in the painting articles some guy on there has done a brilliant tutorial on painting realistic blood splatters.
I really like the idea of using wolves instead of sabre tusks - I think the sabre tusk models are fugly. I like the idea of wolfing up the hunter some of the space wolf bits could work really well.
If you don't mind putting some work into the bases I think you could do something really nice by building them up a bit with ssomething like DAS clat so the slope up from the front of the base. Then you could use slate and fine gravel (check out www.barrule.com
for basing materials by the way) to make it look like they are moving down the side of a scree covered mountain. With judicous use of static grass (again barrule do a ridiculous rage of colours) and snow I think you could really bring the bases to life.
Hope this helps and give me a shout if there is anything else I can help with