Originally posted by bmw I would be okay with just slave mode on any hotshoe flashes I included in lighting. I've been doing that more lately for things like rim, hair and background lights. Simpler is often best.
I agree with "simpler is often best" but am not quite sure what you mean by "just slave mode".
What I'm suggesting is manual control of the speedlights, but instead of walking up to them in order to make power adjustments, it should be possible to do that using an on-camera flash in master mode or an on-camera radio trigger. Both RF60 and V6 are up to the job.
Originally posted by bmw I have two AF540FGZ's and a couple of Neewer TT560's. If the Cacti can power-control the 540's I could save myself a great deal of trouble.
They can.
The AF540GZ is supported with a profile on the V6. Bear in mind that the communication happens via radio signals. No line of sight required.
The Neewer TT560 appears to be a fully manual flash with no TTL support whatsoever. If that is the case -- please correct me if I'm wrong -- then its power cannot be remote-controlled by the V6.
Originally posted by bmw Once set to manual inside Westcott Apollos they are time-consuming to adjust.
Yes, some light modifier solutions allow good access to a speedlite but with most it is just a pain to always having to partially rip them apart to get to the speedlite.