2021-11-28: 100 IEMS Ranked!
Batch ranking:
Iems:
Intime Sora Light 2019: A (hard to recommend due to QC and hard to buy it for people outside Japan)
Sennheiser CX400BT: B
Sony WF-1000XM3: B+
Earbuds:
Koss KPH14i: D-
Philips SHS3300: D
Headphones:
Audio Technica ATH-R70x: A+
At this point, I have 100 iems, 36 earbuds and 15 headphones ranked. 
With 4 more iems (KZ BA10, CCA CRA, Tanchjim ECHO and GS Audio GT12x) and 4 more earbuds (K´s K300, Qian39, ShoonTH ESEP-01BL and Astrotec Lyra Nature Limited Edition on the way right now.