Again, depends how much you want to spend... Higher Amp esc offer lower resistance .... Which is very important in the old day ... A 360A brushed esc may offer 2/3 second more run time vs a 180A brushed esc... But not as magnify today.
If you can only run 2s, and using a ~5000kv 4pole motor, then yes, u need a 100A plus esc...