When should I start ranked in UFC 6?

After you can deny a simple shot and you stop dumping a full combo into a high block. For some people that is a night. For others it is a week.

Is ranked different from Online Career?

Yes. Ranked is the ladder. Online Career is a career against people. Legacy is offline. Do not mix the names.

Low kicks you do not check, shots you do not deny, and overhands you parry. Those three are in the other guides.

Online punishes habits the CPU forgives: spam, empty stamina, and a hole in takedown defense.

How to play UFC 6 ranked: hold your range, deny the shot, and stop throwing into a high block.