For those of you who were man enough to face the Primal Legends without a Masterball, what was your strategy and how did you succeed?

>lead with Masquerain and switch to Mightyena for Intimidate stat drops
>keep Mightyena in and use Snarl constantly for the other stat drops
Most of my team was underleveled so I had to make sure Groudon wasn't going to end up destroying me before I can do anything serious.

>once both offensive stats are at -6, switch back to Masquerain and Stun Spore it if it hasn't used rest
>take him down a few notches with Air Slash until it uses Rest or something
>if it used Rest, switch to Camerupt and bring it down to low HP with Earth Power
>throw Pokéballs and Premier Balls

I ended up catching Groudon with a Premier Ball when it was paralyzed and the HP was in the reds.