? Lower controller port? Explain please.
There are some weird properties associated with the controller ports including grab priority. Honestly, I can't think of any besides grab priority right now, but I'm sure there are others.
I'm pretty sure I even saw a thread about it in the tactical discussion or somewhere like that.
Anyway, with Snake, if you get chaingrabbed while you have a grenade in your hand, the person in the higher controller port will make the grenade explode on them, so it's best to get the lowest possible port (when you're playing against someone who can chaingrab you at least).
Try it out and see for yourself. Just play a normal brawl with two human players (they can even be both controlled by you). Have one be Snake and the other Falco (or DDD or whoever). Have Snake shield drop a grenade, pick it up, then before it blows up, have Falco chaingrab him with his down throw. The person in the higher controller port will explode.
Sorry if this is just clutter or whatever.
Back on topic, I think you should mix it up. If you want, cook grenades to scare him and make him approach you. Know that he can play pretty well defensively, too, though. Watch out for those Gordos!
Also, always try to stay on the ground as much as possible. Once he gets you in the air, he'll juggle you and it gets ugly. Jab his little minions if they get in the way, but don't make it a priority because he might just sneak up and try to start chaingrabbing you (or something just as evil) while you're killing them. Lastly, never fall for his inhale suicide. It will totally mindrape you.
Oh yeah, and if you're allowed to ban a stage, ban Coneria. He can infinite chaingrab you with the wall on that stage. =(