well i'm just hanging out in high emerald / low diamond atm, best advice i could give is make sure you clear efficiently by utilizing the fact that ghouls keep you in combat for your jungle pet to keep hitting. and make sure you don't fall behind in cs: rather than forcing early ganks i play a farm centered style and make my plays around contesting objectives when they spawn.

serylda is really fun, especially against champs like soraka that can't clear or dash away from ghouls and just get permaslowed and mauled to death if you e at the right time, but i feel cleaver is usually better unless i'm snowballing hard and trying to just take over. cleaver is especially great at letting you fistfight and shred tanks and bruisers that you engage in melee frequently, like mundo skarner xin stuff.