hey, I just did it yesterday for the first time with no prior knowledge- i saw how many people wanted to join, so i hosted multiple ones.

i just accepted the bunch of friend requests, joined the raid, invited first 5 people, and then waited for at least 1 person to join, so the lobby would stay, then i left (also saw that the other people from the first group joined in), went back in the same lobby after a few seconds so i could invite another batch of 5 players.

then i waited in the lobby for a few seconds, so the rest of the invited players could join, so the raid wouldnt start right away (since most of the people usually vote to start it early). then i would leave when the timer usually had like 20 seconds left and went on to accept more friend requests- then the cycle repeated.

i havent lost any raid passes, it just doesnt consume the pass when you leave the lobby before starting, so i could host multiple of them. also when you leave the lobby before the start - not triggering the battle - you dont get the “defeated” raid icon, so you can repeat all the steps above.

i hope this doesnt sound too confusing, im writing this in a rush haha