#1
what is the best guage of strings for thrash metal/solong/sweeping/ and good tone

i currently have 10's
due to experince i found that 9's are the worse
should i stay with 10's or change?
i wanna get best possible tone
#3
It depends on a lot, what tuning are you playing in? what scale is the neck of your gitar? there is no best gauge, all just personal preference
Gear
Ibanez RG2550E
ESP/LTD M-10
Fender FM212R amp
EHX Metal Muff
Ibanez WP-7 Wah