The only "meta" pvp (none arena) team is Hidan/Bee/Roshi

And that's more effective with Lightning Main over FM.

But to answer your question.

Roshi or a Barrier mystery removes a large portion of Mei/Mabui. Taking 1010s damage isn't the end of the world. It's her paralyze debuff that hurts. So a team like as long as you're patient. You should win. I'll provide f2p friendly teams as counters.

Remember this is for actual PvP. Not Arena as characters function completely different with artificial stats.

Roshi, Kurenai, GNW Sakura/Sailor and Wind Main.

Take 1010s hit. Make sure to use GNW mystery after standards to maximize slugs. Wind will clear debuffs. Have fun.

Also, Kurenai breakthrough is required.

Sage/Kaze/Wind/Gakido.

It's an attrition battle. You will have to take a mystery however prioritize stopping Winds reset. Honestly anything with immunity up front and a healer should work. Double support also removes the effectiveness of that team. So, can you guess what team I'll suggest? Same as above.

Kurenais debuff removal and shield will negate and HELP you against their only CC from KK Gaara. Mirror passive is fun.

Roshi-Han-Sailor is a weak team.

Any debuff removal character(Hanzo, Gakido, Wind Main) and a healer completely nullifies their core damage. Being poison.

There's plenty of options against this team. Just consistently attack Water Main and enjoy

Now Ay-Darui-Samui.

Roshi and Wind Mains blind passive. That's it. You have Ini priority because Ay cant assault you before your mystery. And roshi will destory their barrier for you and CC Samui (Unless they're running Root)

Here you have options. Han utility, Wind passive Etc.

These teams are vastly beatable. They're not "meta" in actual PvP because they lack consistent and have clear weaknesses. Sure. It's a pain if you don't have the tools to combat them but that's why people create all-situation teams. And why Space-Time teams consist of these hybrid mix. Cause they work.

Hopefully this helps shed some light on some teams.