What lore do you plan to run with your slann? and I agree with Tiarna about splitting the large block. Your slann with higher state of consiousness can actually run around on his own and not join a unit, gives him more freedom. I would drop the two skink characters though and may build a scar-vet out of all those saurus warriors? just make him look beefier than the others
Put another on a cold one as well and drop the big unit of 12 cold one cav down to maybe 9 or 10 depending on pts.