The first two questions are impossible to answer as it's down to your individual preference as to how loose or tight you like your draw. As to liquid ratio's 50/50 is the accepted norm for MTL but personally I prefer 60/40, again preference dictates. I don't think there are any shortcuts to working all this out and fine-tuning to get to where you want to be.
^^^^@Badayuni you’d be as well to just get some 50/50 liquid. You’ll need higher nic strength than you are using in your clouders anyway. Trust me, it’s better.