well said.
The first rule of free for all is.......

The first rule of free for all is that you make sure it's really free for all by not teaming with anyone.

The first rule of chess: To take is a mistake.
The first rule of FFA 4player chess: To take is still a mistake.
When I first saw a video about this principle on YouTube, it changed my chess style and increased my ELO by +200 points.

The first rule in Free-for-all is make it to the Leaderboard, then quit playing.
Oops, forget what I said, we have an update!
Help the person opposite.
If you do not help the person opposite and he goes down you are left piggy in the middle and be ganged up on.
See who he attacking and join in, if he being attacked stall the attacker, and just hope opposite player is sensible enough to know the above rule.