how to deal with SOSP:
- Use Rinne Sasuke to fear him so he wont scale (50/50 chance can fail horribly tho)
- Use "suppress immunity" ninjas like NY Hashi, Summer Kurenai, Ibiki, FM imprison + Edo Itachi, Habanero Kushina, GNW Madara (undodgable chase really helps) etc, etc.
- Outshield him. Using GNW Madara, Earth main, Suigetsu and Swimsuit Konan / Kakuzu can deal with SOSP (once its your team vs. SOSP, dont use mysteries, just stack shields)... works only if you have solid power on other positions too ...
- Use Ronin Zabuza to steal all attacks from SOSP.
- Use Hizuren´s reaper seal to one shot him.
- Use GNW Obito to teleport him away.
- Use Kimono Itachi to prevent SOSP from using standards (really team based, it wont work in most cases)
- Use irremovable ignite (Shisui, Konan...) to prevent healing
- Use Ashura for enfeeble to limit his dmg. (you could got him, if you were lucky)
- Use Indra to set Anxiety (you can get him by rap!ng your wallet)
- Use "immune to ninjutsu" ninjas like Edo Nagato, Hashirama, Madara edo tensei to limit dmg on your team.
- Use Edo Minato´s barrier to boost your defense greatly

Those are pretty much only ways for now, how to get a chance to beat him. However most of these require fairly stacked team (not only P1), which can be considered real at .... say 600k+?