A couple thoughts to hopefully help make your next dripping adventure a positive one.
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The Kumo is a good RBA for dripping. It has a nice deep juice well.
Make your wick tails long enough so they touch the bottom of the juice wells.
Keep your wick well saturated with juice. You likely know this, but just in case you don't, as your wick starts to dry up you will begin to notice less and less vapor. That's the time to once again saturate you wick with juice.
With the Kumo's deep well, a coil with a 3mm ID, a well saturated wick and vaping between 14w - 18w you should get a minimum of about 14 hits (likely more) before needing to add more juice.
Until you are comfortable, pull the top cap after 10-12 hits and check your wick so you get a feel for when you need to add more juice.
You probably knew all that!