I'll say this about Aikido. When I was involved with BJJ an owner of an Aikido dojo came in. He was clueless like everyone is starting out but he was very adept at avoiding arm locks. I guess all his years of Aikido gave him a sense of how locks work and how to defend. Anyway that's my guess.
Seagal is full of shit and a fat sack of shit to go with it all
A poke in the eye or a kick in the nuts is always effective.
As long as you realize your opponent can do the same.
Any grappling that makes use of a gi to manipulate the opponent makes me pull faces. When's the last time you went out for the night and were attacked by a man from feudal Japan?
Muay Thai is great because you don't stand there waiting for your opponent to attack, you dump a bunch of hard strikes