VMCG has the benefit of nose wheel forces acting in addition to the rudder.
I wouldn't be too sure of that. Ref AC 25-7A:
(vi) VMCG testing should be conducted at aft c.g. and with the nose wheel free to caster, to minimize the stabilizing effect of the nose gear. If the nose wheel does not caster freely, the test may be conducted with enough nose up elevator applied to lift the nose wheel off the runway.
(vii) For airplanes with certification bases prior to Amendment 25-42, VMCG values may be demonstrated with nose wheel rudder pedal steering operative for dispatch on wet runways. The test should be conducted on an actual wet runway. The test(s) should include engine failure at or near a minimum VEF associated with minimum VR to demonstrate adequate controllability during rotation, liftoff, and the initial climbout. The VMCG values obtained by this method are applicable for wet or dry runways only, not for icy runways.
Some aircraft quoted VMCA with up to 5 degs bank towards the live engines.
I think that, unless you can cite a conventional aircraft for which Vmca is NOT demonstrated with 5 deg bank, you might presume that this always will apply. Vmca is VERY bank dependent due to sideslip considerations. Poorly managed bank angle in a Vmca situation might prove to be both embarrassing and exciting ... and, quite possibly, terminal.