It depends on how much cps you use. Because all the mice aren't the same. Each mouse has its own sensitivity called "DPI" dots per inch.
If you have a mouse with high dpi. Lower the sensitivity. You have to find your own sensitivity. The one with which you can aim better. Also you mouse pad matters. Some mouse pad is very slow and some are very fast. You really don't need to crit every time. You can combo by moving right and left and circling around your opponent. You can crit if they are standing in one place, or busy, for example, eating gapple.
If you need more advanced tips, message me
or maybe you need to duel me, I'll show you,
I don't play in pika :/ you got premium account?