ABB strings are good, but the maker isn’t as important as the material. If you are not shooting BCY 452x at a minimum with that poundage, I could see your cables taking a beating at that volume of arrows.
As far as timing and sync on a Hoyt, they are the same, so I wouldn’t get worked up over that.
Lastly with paper, have you mocked tunes every arrow to get the exact same bullet hole or the acceptable rear you want? If not, you are spinning your wheels shooting paper with random arrows. At 80 pounds and little holding weight it doesn’t take much to apply torque or face contact to get a bad tear.
Get the cams times the way you want, mark them with a silver sharpie and watch them to see if they move. If they continually move, get new strings and cables. BCY 452x, BCY Magnum or the Ghost XV are the three most stable materials made at the moment.