Anyway to link different commands to PiP?

I'm trying to work out a set-up with 2 druid where I can have them doing various things driven by the action bar page they have showing. I could set this up with different keys, but ideally what I'd like is for it to change intuitively when I change the PiP, trouble is I have more than two action pages and only two PiP commands (which don't seem to be working quite right, but I'll put that down to me not setting it up correctly at this stage). A bit more detail, to try and explain better what I'm trying to do.

I'd like to have my druids set-up for various grouping scenarios, but I'd also like whichever screen I'm on at the time to function as the main toon (so whichever screen I'm currently on I click shift to cast from that toon and ctrl to cast from the other, rather than thinking shift for charA and ctrl for charB). I'm planning to achieve this via various action bars, as follow:

For DPSing:
Bar1, ToonA DPS main, ToonB DPS alt
Bar2, ToonA DPS alt, ToonB DPS main

For Healing and DPSing instances:
Bar3, ToonA Healing main, ToonB DPS alt (different from above though)
Bar4, ToonA DPS alt, ToonB Healing main

For Healing raids:
Bar5, ToonA Healing Main, ToonB Healing alt
Bar6, ToonA Healing alt, ToonB Healing main

Idea being if one runs in to a problem (or oom) I can switch and do the same actions from the second character without having to try and remember what weird key combo I need to press to get something done.

If this was just one switch it would be simple, I'd set my PiP button for ToonA to switch to the ToonA main bar and the ToonB alt bar and the PiP button for ToonB the other way around. But what I'm really looking for is 6 keys (or less with modifiers), but still linking in the two PiP function keys.

I was thinking this might be possible with hotstrings (which I've never used), but wasn't sure if it would act like an in-game keypress (so not activate the PiP).

So, say I bind actionbar1 to F1, 2 to F2 and so on, could I make a hotstring so that when I press # for example it presses F1 and my PiP key?