Did I Screw This Up For 9th Priming?

I have four 2H prime scrolls left to try, each one basically 50/50 with a lucky day scroll, but the prime ones come with a nasty chance of blowing it up if they fail, which means I need to use shield scrolls, but I noticed today that in the Cash Shop the shielding wards say they won't work on something that's been enhanced 12 or more times... which I presume they mean star enhancements... so does that mean I'm S.O.L. here with prime scrolls? And, if so, what's the next best thing? Regular 9th anniversary scrolls?