I'm kinda bad at teaming, any tips how to be good at it?

Press w in agario to give a bit of yourself to someone and see if they help back. Make sure you're atleast on the scoreboard first to get that importance which will help a lot.

Edit: Floating around a huge leaderboard player with their name usually gets you food.

I've seen that in youtube videos, thanks though! Still need more tips :P

Tricksplit with teammate to eat other guys faster

best io game is slither.io

I'm not good at tricksplit but I'm good at popsplit and double split, Slither.io is the easiest game, yes.

Practise, Practise, Practise! Or just watch youtube tutorials xD

What's Practise

Playing is the best way to get better!
I recommend going around looking for random teammates if you don't know anyone who plays either one of those games

What u need to do is try not to be close to anyone else whatsoever and just eat the lil pebbles and bait around viruses