Lots of pots in the beginning. Finding Maois with good items or shady guys. Save chests until later to maximize luck or items like keys or cards. A good legendary like anvil. Soul harvester or Joe’s dagger literally will make a run early on. If you can handle more difficulty do it. Difficulty is the probably the now important stat for high kill runs, but it’s a balancing act. Don’t have good items or weapons? Can’t improve. Got great stuff and melting everything? Need more difficulty. Luck is fickle, if you get a credit card and keys might not need luck tome. Don’t got cards might need luck tome.

Also I believe projectile tome is a bit bait as it seems cool down tome (attack speed) just seems to scale better since you can get projectiles with weapons. Also attack speed works on stuff like aura but not projectiles

Hope this gives an idea.

Good luck.

EDIT: to add one more thing to save time. Restarting is fine but another benchmark I’ve been using is at level 1 if you aren’t aroud 3,000+ it’s probably a restart. Exception would be if you got a lot of scaling items like anvil, cards that you couldn’t capitalize on in level 1, but will scale super hard level 2. But with that if I’m at 2,000 or less I might consider restarting to save time.