The problem with Kyogre is that he will oneshot your pokemon (even gras) with his charge attack at your level, meaning you will have to rejoin at least once and most likely twice, costing valuable time.
No other legendary has had that amount of damage. Also, for evey extra player you get, you get more damage and thus quicker kills and thus less fainted mons, and this ramps up pretty hard.
Also, a Blizzard Kyogre + grass pokemon don’t go well.
Also also, Moltres is weak and Kyogre is the strongest we’ve had so far.
I really think 5 is too low, way too low even with lower level players. Most (all) others here will agree on that. Feel free to try it, but it’s a waste of raid passes IMHO.
And if this is your situation for future legendaries: please powerup your mons above level 30. I know you’ll only get half CP for increasingly more dust but that little bit of HP and damage will really help if you’re struggeling with low attendany at level 5 raids.
Point in case, most Kyogre raids i hear people complaining about having to rejoin while i’m still on 4th mon and we all are level 35-40. These are the people who don’t powerup.
Dead dps = no dps. The longer your first team stands, the better!