A kind warning
Please do not use the autoselect vs Groudon or Kyogre.
Kyogre Autoselects will almost always generate Aggrons, Cloysters and lv20 Kyogres. Groudon autoselects are almost always Ho-Ohs or even worse, Lugias.
If you just go in with the autoselect team i'm afraid you will not make it even with 7 or 8 people. Cloysters are known for generating less power against Kyogres than Cresselia at lv35, or even worse, lv20 Pikachu.
Make your own team, especially if there are only a limited amount of people in the raid group. 4 groups of 6 lv30 frenzy plant venusaurs can pillage a kyogre without blizzard easily but i won't be going home safely if there are 7 or 8 people and i am the only one using customized electric types and the rest use a bunch of cloysters and aggrons.
Answers
What's scary is you could say this "Well technically" response to a newbie asking about it and they'll completely gloss over the part where they need to be MAXED and still run with auto-selects.
Personally I'm stuck with indecision since we have so many new things to use against them I don't know what to use.
Yeah, that's why I generally don't tell funny anecdotes like this to people if I don't know they'll understand them in proper context. It'd still be funny to see an all Ho-Oh trio, I know there are crazy people out there who have six maxed.
I'll personally use this as an excuse to finally get Electivire and Roserade for the dex and maybe max a few FP Venusaurs more, got a 100% and shiny 98% that I want to dust off even if they get outclassed by Sceptile in 2 months.