Welcome to Librarium Online!
Just a quick question about Meganobs they don't have an invulnerable save do they?, they just a 2+ armour save, twin linked shoota & powerklaw that comes already with their mega armour.
Correct, that's the main flaw with meganobz. Their advantage is that they're more cost effective, point for point, than most groups of nobz or biker nobz, but their disadvantages is that they don't have an invulnerable save or access to a painboy.
The only way to give them an invulnerable save is to take Mad DoK Grotznik, who can give any model in your army a cybork body for 5 points each. He can also act as the meganobz's painboy, if you like.
"Any job worth doing, is worth doing with a powerklaw."