How often do you shape your tip? What tip hardness and tool are you using?
After having a tip installed, I'll play with it for about a week or two. Then I take it back to the cuesmith to have it reshaped and de-mushroomed.
Couple weeks later, I'll re-shape it one more time, and then I leave it alone. I'll scuff it up every once in a blue moon.
Maybe once or twice a year, I'll re-shape it, just to have a fresh layer.
I use a willard's nickel radius for shaping, and a kamui gator for scuffing.
Im currently on a victory soft, but Ive played with zan mediums the most.
A tip will last me about 8-9 months (I play a lot and use my cue for breaking and playing). It could last longer but I don't like the idea of realizing I need a new tip right before a tournament.