potions are very good, a bat n spray (that isnt green) would help too. the only other things i can think of is save the sprays for ghost melee-immune/tanky enemies, save the melee for enemies that wont die to a knife or a slide, always try to look for the closet room in the city areas if you need it, and always spam swipe or slide when going to a new room incase an enemy is right there. all that and the game feels genuinely easier with a controller lol.