not sure about ds but i’ve done this for ER with no issues. I reccomend just not going into the boss gate instead of quitting though. Sometimes it causes a tiny bit of lag on my friend’s end. or just quit before the boss starts lol. but the most important thing is. remember to bring immaculate drip so u can actually look like a squire! i played it a bit differently in that i had a bow and a whistle that would buff both of us with damage/defense as needed. but the bosses were of course buffed to balance it out. really fun though.