Hi,
As an avid sniper who is sniping even while typing up this reply

, Just snipe your way to champs. It requires patience but it isn't hard if you do it in sessions.
Usually takes me around 1.5 days to get to champs from silver or so. I'll leave a few tips so it helps you in farming as well as I don't snipe for trophies, more for farming purposes in m2.
1. Never go without full barch army in your camps.
2. Use 2 archers on the townhall and close app / reopen to instantly finish snipes with minimal troop usage. Make sure to use 2 or else you'll lose the battle
3. Avoid every base with townhall either snuck in between V edges or townhall with walls in front of them to funnel archers away
4. Zoom in fully after seeing your first base so no troops will be fat fingered when you next. I see people misclick so much that it really hinders their progress through each league
Hope that helped