I'm currently using the IKV Stealth Cannon 1.8 on my RSM, and I'd have to say it's not performing very well with bottom feeding. The bridge inside the atty doesn't get soaked unless I totally flood the atty with lots of juice tiding around in the catch cup, and I have to deal with dry hits all the time. Although it's great once the bridge is soaked giving lots of vapor production and good taste, it just doesn't perform with consistency with bottom feeding method. Sometimes I get frustrated and just take out the feed bottle inside the mod, drip a couple into the atty, then install the bottle back in. Then right away I get great vapor and TH.
The hybrid was the first atty I've ever used so I never realized how spoiled I was until now. I have never, not once, had a dry hit on hybrid, and the performance was so consistent even when I was chain vaping.