3rd party made Animation import advice?

Hello, i was recently given the advice that it's better to animate in another program like Iclone or motionbuilder, and THEN import to daz if you want to get good IK rig control and locks.

So, just to clarify, how would i get animating something like genesis 2 for Daz, in Iclone or... another, DO i import gen2? Then export? or just export a rigs animation to daz and apply it. Little confused.

And any animation tips too would be nice, what programs or products might help, i'd love to start really making good ones. Ik rigs in Daz are very finicky