Best solo raid option is a level 100 Scovillian with only Spicy Extract and Helping Hand. Make sure all or most of the AI Pokemon are physically inclined. It cannot use helping hand so all it can do is use Spicy Extract, greatly increasing the target's Attack but lowering their Defense, but with no attacking moves the defense drop doesn't matter. Use spicy extract on the ditto to make your AI partners deal move damage, and and use Helping Hand whenever it has a shield up or whenever it's defense is at -6