I was playing toribash today and decided I need a new opener because my kick is getting boring and it's not too great. I was wondering what type of move I should do (a kick, punch, grab, etc)
What do you guys think?

Well, what mod are you talking about? And I suggest what ever that mod is, you should be original. Load the mod in free play and experiment.

For most mods, best move should be a kick. Like lift kick in aikido, high kick in wushu, split kick in judo.
Kicks are stronger than punches. But punches are faster than kicks.
If you want to grab, i prefer to practice grabbing and ungrabbing. It usually tricks the opponent once you grab them and ungrab in the next move. That trick usually works in aikido.

Try making a Kick+punch move like What I do in Judo.
And since you are new, why not try the beginner sanctuary?

Well when starting out I usually go for the grass type pokemon, because it seems to have a disadvantage throughout the region, in general. But solo-ing any starter type should get you through the whole region anyway so no worries. Just keep 5 hm slaves and your starter and it's all good.

On-Topic.

I assume you are working in multiplayer aikido, because that's what real men say. I suggest something involving moving your arms in front of you, ready to get you into a position of a lower centre of balance.