OK so IKTIPS Blue is all about timing your jump to BOING on this blue spore receptacle
You want to party down and hit timeslip late, around these 2 wider blob-y spots on the rail where Rei is
then jump at the very last second and slam into the blue spore receptacle to get enough height to do regular IKTIPS things
If you hit it just right sometimes you go directly straight up; this is fine, the gravity high in the air here pulls you diagonally forward and you can convert that into speed for regular IKTIPS things
It's a little tricky because you can end up doing IKTIPS from a wider variety of new and unfamiliar angles, but if you can get the timing down for the jump and slam into this BOING bounce, it feels barely any harder than regular IKTIPS (maybe even actually easier because the approach angles are less tight)