Hmm .. Actually, if you really want to get him as soon as possible without using Seal Scrolls, then you may consider buying his frags from the Redemption Store, at 1500 Group Points per 3 frags .. Or try to reach Sage of Six Paths in arena because Arena Rewards gives random 30pcs Pain fragments if you reach Sage of Six Paths ..

Yeah, if i remember it right, the Pain Optional Pack always shows at "One Ingot Sales" or sometimes in "Time-Limited Shops" .. It is priced around 2.5 to 3.5k, not sure how much is it but somewhere around that numbers ..

No problem bro, it's good that you ask for something you wanna know than making a move that will put you into deep mistake .. good luck with your jigokudo hunting bro :D