The rules need to be clarified, I suggest making these additions to the ruleset for Co-Op:

Friendly fire settings: Any (I interpret this as the current rule, but this way it is written out)

Auto aim settings: Any (Once again, I interpret this as the current rule, but it needs to be written, of course auto-aim could also (probably should?) be against the ruleset as it takes away from the skill of the runner)

Reconnect needs clarification. According to a forum post you can stack team buffs by reconnecting constantly, meaning it provides an advantage via a glitch. However there are also bugs (unable to respawn etc) that can only be fixed via reconnect. As such it should be decided on what the official rules are regarding use of reconnecting in coop runs. Personally I would say reconnect is only allowed if you do not pick team-buffing skills, however this is of course just my opinion on it.

And just to be very clear I think controller ruleset can be specified too, as in

Input method: Any allowed, if using controller you can also use auto-aim

Of course if people think auto aim should be allowed for mouse and keyboard too that description would have to be updated.