First, I want to try hybrid.
I'll string velocity 16g natural in the mains, (55)
and Poly in the cross. (50)
I think
@ByeByePoly has good advice about trying hybrids. Try full bed of a certain string first to see what it plays like. Then think about combining certain strings that you like.
However, I started my hybrid journey buying a reel of OGSM (s-gut) to use as a cross. Then proceeded to test a bunch of poly in the mains. This was hoping I can protect my son's arm as well as myself. I'm not sure that it's the most ideal for that intended goal.
A poly tends to be low powered. But when crossed with OGSM feels pretty good when fresh. But as the poly loses tension, the stringbed gains power. Poly in full bed (fb) maintains similar levels of power even as it de-tensions.
Do you have a more recent video of yourself playing? I heard you've bumped up to playing 4.0. But from previous videos, I think you can play with a good multi. You'll hate S-gut. But nothing wrong with playing with poly as long as you re-string at good intervals which it sounds like you are.
I like playing Velocity/Cream because:
Velocity fb has good control, but not enough spin, a bit under-powered for my taste, and too dead feeling.
Cream is a soft poly with average power, average spin, average feel, better than average tension maintenance. Nothing great, but nothing bad. But it does have a fairly slick surface because it's a poly.
The mains contribute to the majority of the stringbed performance. So starting with Velocity in the mains, I cross with Cream. The Cream supports Velocity mains by: enhancing spin potential, boosting power a bit, adding feel.
The strings last about 15hrs or so and then Velocity starts to lose its teeth. At about 20hrs, the combo also loses too much power. So no power, no spin and I'm compensating with my strokes again and then my arm starts to hurt. So plan on re-stringing after 15hrs.
Gut/Poly is very interesting.
Gut is a very textured string. Pulling through the grommets and you can feel the friction. In full bed, it has a lot of power, good control (so I've heard). But not as much spin potential and doesn't last as long since it notches. But crossed with a smooth poly, the power is toned down, there is more spin potential and the gut lasts longer because it doesn't notch as fast. You can also cut out the poly and re-string just the cross again.
I've hybrid with Gut/Multi (Velocity) as velocity is low powered and can tame the gut. It also is slicker than gut so more spin potential. Velocity will wear out much quicker, so I again cut out Velocity and just re-string the cross.