What ATC would you recommend using out of VoxATC, Radar Contact, ProATC/X or PFE Deluxe? i'm looking for one that the co-pilot can handle comms with and I dont have to use precise scripted lines.

My personal experience with PFE has been pretty poor. A multitude of attempts and I have yet to see success getting through an entire flight from beginning to end with ATC. Not necessarily MCE's fault by any means, but I'm finding it to be convoluted and has an extremely high failure rate.

 

As always your mileage may vary.

Radar contact the co pilot can take over the ATC.

 

Also if your plane uses default autopilot (usually GA planes, but not PMDG etc), the copilot can also take over the plane for you too and adjust according to ATC's responses.