Stopping by for a bit of an update... no I haven't ordered a new case yet...
I've ditched all my other flavors and have been vaping Bluemist's Cinnabun exclusively. I have switched to 100% VG (still with the extra flavor added) and dropped to 16mg strength... it's heavenly

I also picked up a couple more batteries... High Drain IMR type. Jury is still out on them. They work nice with my 2.5ohm cartos... maybe a little smoother vape, but they are only rated at 350mah so I only get about a day from one (I bought 4).
Oh and a quick note on the Royalsmoker E2 cartos... I'm at about 3 months in and I'm STILL using my one main carto!
I was chatting the other night with a fellow friend/vaper who almost had me talked into ordering some cisco 306's because I was have doubts about the E2 + 100% VG. Not that anything was wrong, but I was getting flooded reservoirs / dry vapes more often than I'd like. I had ordered a new box of E2s thinking maybe my #1 was failing (my others were still loaded with the flavors I've stopped using)... but was shipped the wrong color and I was waiting on the correct ones from the vender. Well I pulled all the caps out of my #1, rinsed it for a minute or 2 in scalding hot water from the tap, dry burned it for a bit... and BAM! Perfection again
So... at 3 months old, it still vapes like new (and deals nicely with the 100% VG). I have since cleaned out my others so I have plenty of spares!