Welcome to the funhouse, te.t!
For over a year, the gs-air family of tanks served me well every day. Though I have moved on to something else now, and given those tanks to friends, I have good memories of them with some coils, most certainly not including the 1.2 ohm cotton wick variety.
The 1.5 ohm dual coils heads were always reliable, good tasting, and long lasting.
The 0.75 ohm coils provided better flavor and vapor.
The Ni tc coils were good in combination with a mod other than the eleaf 40 tc. Your Pico should be fine with those.
What did I so dislike about the 1.2 ohm cotton wick coils?
1) The cotton wick- quickly and easily saturated, causing leaks, gurgles, and a generally awful vape.
2) The cotton wick- As you may well have discovered by now, once cotton is burned or
absorbs any bad flavor, it cannot be returned to a useful state.
If,you can find a source for the 1.5 ohm coils, I think you will enjoy them more.