You'll be super safe at those resistances with 20s, in fact the Molicel P26 will give you a good bit extra runtime whilst still being well within the cells limit.
I was running my 20s at 0.1, aye I know 42a not taking in to account sag etc - I was using that setup 3 or 4 times a day for 3 or 4 lungfuls of CBD but it was on holiday last week and was forced in to using it solely for 4-5 days as the coil went tits up on my usual daily vape! It performed admirably and I was getting 4 or 5 hours out a cell I think--had to keep right on top of charging as I only have two of them (I remember thinking that I'd ideally need four for a full day's use if I could only charge at night.)
But I ordered a 21700 mod today and some 30t's today, planning to run that at 0.13 due to the extra oomph from the 30t and being a wee bit inside the amp limit.