I can ALMOST do 8-10 but the Magic Knights hurt like crazy. Remove them from 8-10 then it's an entirely different story.
With my knight I have no problem. It's my wiz that bothers me because I can't auto it even at the level 7 stages. I'm planning to temporarily switch to a VIT99 but I don't know how effective that would be. The highest I can auto/afk for now is 6-1 or 6-2. And it sucks!!! Totally not worth it because it takes too long to level up. My poor wiz lagging behind. Sob.
Wow, that's still pretty awesome. I think we can all agree that Magic Knights in numbers are a huge pain. The wiz definitely gets the short end of the stick in SD. I saw some people mention safety wall, but i haven't bothered to try it. Too busy focusing on my sin.
So no guarantee of an S or SS. I'm torn. Will it be worth the risk?
Are you able to use diamonds to get special jewel stones? So far i'm 2 for 2 with getting (SS) when using those. You may want to check the "compounding merc" thread in Game Information for typical results, but i think you have a PRETTY high chance of getting at least (S). At the worst (R5S normal), you lose some HPA and HP, but gain a significant amount of def, mdef, and aspd. In merc battles, speedy skills are what kills!
Just gotta weigh what you have to lose vs what you have to gain. Personally, i'd do it lol.