Hi. i'm looking for a novel with a system that lets mc upgrade his skills to max level then evolve it and then level it to max and evolve it TO INFINITY AND BEYOND like in Way of the Devil. Bonus points for: strong female lead that is actually usefull the novel not being "infinite mana in the apocalypse" the skill evolution and combination being interesting the novel not being hot garbage no BL thanks.
https://www.novelupdates.com/series/tensei-shitara-slime-datta-ken/ Skills evolve interestingly (one of them became/ is sentient, kinda like a system in a way), there's no female lead (no romance) but every female character are strong/ skilled, a powerhouse in their own right with good personality (no clingy annoying damsel in distress).