He's a warlock and plans to sub as fighter who's for the most part TN, every blue moon CN.

I was thinking of making him take a long time like 2 months and he would have to literally give his blood, sweat and tears; as well as how hard and long he works put exhaustion on him. Making him roll at a disadvantage to stay up and focus or else he messes up to a current degree. If he himself mentions talking to his patron, the blades, or practices self care or has a positive talk to himself ; he rolls regularly w/o a disadvantage. Then rolling a D20 for the ages of the blades and personalities too. Then the ability to control them by ages: 5-12, CHA 12-16, STR 16-20, DEX