I may be out of touch on this, but I'm not aware of any legacies counting tiltrotor one-for-one. Airliners, tiltrotors, and helos all handle the same in cruise flight...and usually on autopilot anyway. It's the landing technique they're concerned about, about V-22 are powered lift, not fixed wing.

Do your research with specific airlines but I think you'll find you're going to need 1000+ FW turbine, so start thinking about how to get that. I suspect that in 2-4 years any mil guy with a decent track record who meets the mins will be able to bag a legacy job. Try to get yourself into a non-obligated FW flying gig where you can bail on short notice when you get the time you need...based on competitive mins at that exact moment, which we don't really know at this moment.