I also play Tiger Sniper ... mine last forever(year+) playing maybe 10hrs/wk or sometimes more.I currently play Tiger Sniper tips. I get about 4 months out of a tip playing 6hrs./wk.
I almost never shape/scuff the tip. Just doesn't seem to need it.
I chalk (just Masters) nearly every shot and I'll miscue about once ever 3-6 months.
I think some people mess with their tips way too much because they think it will make them play a bit better/blame it for misses/miscues.
I probably should change them more often? ... but it doesn't seem to hurt me.