I have the MMXLC2(Mega Man X Legacy Collection 2) and I found Mega Man x6 to be easy because 1. You can change the difficulty in the options menu, and 2. If you unlocked Zero, you can him to destroy the mavericks with a controller technique called "Saber Dash Cancel' and here's how it works, the first two slashes don't trigger the bosses' I-frames(invincibility frames), so if you dash after the first two slashes, it resets your inputs. So, if you press the Z-Saber button twice and the dash button very fast, you will defeat the mavericks very quickly, so try it if you have the legacy collection 2.