Boy, many people using gut
As for myself, I've only had my sticks for a short time and have used 2 hybrid combos and two full bed poly:
a) 1st hybrid, poly and multi (mantis comfort) - nice comfort and control but broke relativery early.
b) 1st fullbed poly: weiss canon scorpion - great control & comfort - still have it and saving it for next important matches
c) 2nd hybrid: multi + syn gut - awful lousy combo (don't recall the details, I've written about it somewhere), cut it out well before breakage
d) 2nd fullbed poly: BHB - felt nothing special early on, now that the string is well into its 6 or 7 hours, now feels very good and crisper.
Next combo I'll try is : Prince Syn gut duraflex on mains vs BHB on crosses
Next combo: I have a couple sets of Tourna strings that I'll try
As soon as dry season is fully on, I'll also go for the gut+poly combo.