No ruleset at all, except safety.
I have been proceeding as follow in the last year:
1) My goal is to develop an aikido that may work in a really real situation. My idea of a "real" situation is that of my boxing background - over 20 years ago. An incoming attacker fast on foot, throwing punches, and not intimidated by an atemi.
Kicks, throws/takedowns and groundfighting included or punching only?