You listed the painboy as an
HQ and the big mek as an Elite, it's the opposite, but it doesn't matter, it's clearly a mistake caused by distraction
I don't like units of 20 boyz on foot, try to fit the max size. The megarmor and the blasta are a waste of points, the big mek only need the
KFF and eventually the bike. The killsaw is nice but quite expensive, it's better on the paiboy cause it's only 3 points above its standard mandatory loadout. With the spared points you can add some other boyz.
I'm also not a fan of lobbas, in this edition they got nerfed pretty badly, but still decent objective campers. I'd go with 1-2
KMKs instead of them though.
Overall list looks ok