1.) Supreme Economy EM-edition: just for realizing abnormal usage of ressources somewhere and see what i need it for
2.) Ecomanager: I switched off any throttling function i love the mex upgrade function on click and right click with engis it makes life easy. The overlay of mexes nukes and tmd is also very nice and needed. I think sometimes it improves ressource sharing if somebody else has the same mod but i never paid attention to it. It manages mass fabs very well better than mass fab manager even without activated throttling.
3.) Notify v3.8: essential overlay very nice
4.) notifications v5.2: not to forget stuff sometimes reminds scouting in the right moment
5.) transport hotkey: it is autoselecting and adding the next idle highest tech level transport to my active group. basically i can when selected my units press hotkey "i" then "u" and unload somewhere and the units will be transported there if a transport was idle but this function is bugged as i described so there is a second hotkey which is autoadding the next idle transport and jumping with cam to it so i can right click and just need to unload somewhere.
6.) Vet Names: funny to get names on units with veterancy, sometimes help to see how sucessful some kind of units are. Mongoose for example always will reach lots of vet levels and still lose the game lol.
7.) Common mod tools: simply needed to exist ....
8.) Idle Engineers V2: essential overlay addon
9.) better lod: i switch it off sometimes because i am not sure if it is the reason for small lags
So i would say 8 ui mods since mod tools are not really a mod.