Aha, that's some good advice. Yep I'm working on multi's in main, poly's in the crosses. Was enjoying full beds of polys, but after a few years my arm needs a break, need something a little more friendly. Wanted the control of the poly and bring some power back I was getting from the multis. Good to also know about the lively/dampened note, learning this stuff is really neat.
I don't have much hybrid experience ... but it doesn't stop me from having some thoughts on them
To me, the mains will be more important in how the strings play ... so I would try to narrow that down quickly. Trust me ... string testing, particularly hybrids is a rabbit hole. It's also fun ... but better to find your go to strings, and then test on the side. Hard to do without 2nd racquet.
So to me, it would help you to narrow between poly/multi or multi/poly. (I'm assuming no gut/poly ... that will be your max spin like fb poly).
Poly/multi|sg ... more durable, probably more spin
Multi/poly ... feel, arm-friendly
You said you are not a big string breaker, so the multi/poly is an option for you. Me to. We are lucky, because many here will break multi mains to fast.
So, IMO ... pick your arm friendly main as fast as you can. Co-poly or multi. To me, I need to hit a string fb to get a read on it. If I play two new strings in a hybrid ... how do I know if I like a string, or if one was so good (or bad) it masks the other one.
So muti mains:
I was coming from fb rpm blast 16 @52, so I knew I wasn't looking for a powerful multi. I also wouldn't string past mid-tension 55 recovering from TE. So start from the power level you prefer. PPC and Velocity are low-mid for a multi. I think V is a little more powerful than ppc, but plays better. A good starting point for low-mid power end.
But that's a waste of time if you want bigger pop from your multi main. I've never played the NRG2 ... you seemed to have liked that. Good feedback would be someone who has played both ngr2 and velocity.
My only feedback to poly main is Cream was pretty arm-friendly ... even to my post-TE elbow. It's not muti-friendly ... I would feel the poly outside the sweet spot. A test of fb Cream might be a good choice for you. FB @50lbs was very controllable to me. You might find you have no need to hybrid ... restring once a month and good to go. If I never had TE, most likely I would be playing fb Cream.
Good luck in the hybrid rabbit hole. Say hello to
@Traffic and
@392Hemi.