What should a pilot do in this lost communication scenario?
It means to expect radar vectors between PHX and DRAKE because ATC expects to have to move you around to accommodate the traffic situation.  If you had a comm failure, once you squawk 7600, ATC will expect you to find your way between PHX and DRAKE by the most logical path.  

In this case, because you had filed to fly along V105 you would take that route and that's what the controller would expect.  The controller would quickly figure out what you are doing as you proceed down V105 and would be able to route other traffic to maintain separation to accommodate your track.

The only thing that would create a problem is if you headed off in some direction that made no sense to the controller once at PHX.