A minor suggestion, since you're unbound, might be to take an Iron Hands Master of the Forge as your Warlord. Bonus to repair rolls, he can make a piece of terrain in your deployment zone "better". He's got a more impressive stat-line, and he can also take some kind of ranged weapon, if you're inclined, though his repair ability suffers a bit. With Servo Harness, he repairs on a MEQ save.
Instead of 4x 5-man Ogryn units, you'd probably be better off with 6x 3-Man units. This would free up a handful of points, and allow you to be more flexible with them. The odds of overkill on a "last wound" go up, protecting models from other units, while also keeping models alive from 2 different units. For example, if 4 wounds are applied to a single unit, you lose a guy and a wound. 2 wounds to 2 units keeps you at full attack strength.
I think you're putting WAAAAAY too many points into the Muties. I mean, nearly 2/3 of your points is not doing a whole heck of a lot except providing cover for the rest of your army. I think your army is going to be stomped pretty badly by anything with halfway decent mobility. And if you're facing anything D or S10, you're in for a world
There's precious little in way of anti-tank, and no anti-air to speak of, so lists with significant Vehicle presence will be very difficult for you to deal with.
All in your meta-game, I suppose. If you're facing off against slow moving, assault favouring forces, you'll probably be ok.
Welcome to the site, by the way!