This set should never happen.
What you are doing is making all mall players quit this game.
There was a balance between 72 set and 89 set, 72 set gives CAD / SCAD but neither HP nor SCC / PCC, however 89 set gives SCC and HP but no SCAD / CAD / PCC.
This new set you want to add into the game is OP, for so many reasons.
1.No need even 1 cent to reinforce.
I know you dedicate in helping free players enjoying this game too, but the problem is free players should never as strong as mall players. However, this set makes all players become even stronger than mall players. Huh?
2.High DEF, HP, SCC / PCC, SCAD / CAD all in one.
This new set gives all the stats we need, even higher than all old sets. You can have high dmg cuz it gives SCC / PCC and SCAD / CAD, lots of HP, Cap DEF. No one will use other sets anymore.
3.My suggestion
Make the Potens set stats equal with stats of 89set +7. (Because free players can make old set +7 when there's a forge event, but still cost lots of lant without tool.) For example, the final stats of Protector Potens HELM, (it doesn't matter whether it can be reinforced or not, I mean the final, strongest stats must equal with 89 set +7.) DEF around 200~300, HP around 50~100, SCC / PCC around 1~2%, SCAD / CAD around 20~30.
If so,
1.Free players have one more choice, and they can enjoy this game more. (This set is stronger than 72 / 89 set +7 and cost 0)
2.I think most of mall players won't camp the boss because it doesn't worth for them.
3.Also, players have on more choice to mix because this set gives SCC / PCC and SCAD / CAD, although each stats is not as strong as 72 / 89 set.
Sincerely, I hope any GM seeing this post in detail and thinking about it.