EII imo, you aren't airy enough for SEI. SEI don't like to overthink or be too serious about things. They are suited for letting things go and not brooding. Also on a technical level, EII and SEI are benefit pairs and very similar, but EII has a stronger psychological link to Si(2D)+Fe(3D) through the HA, like more of what a type is when relaxed, whereas SEI is more like EII as an active performance, with Fi being their demonstrative. So EII would be more like ILI as a performance. Does that make sense?

It's basically which one represents you more
relaxed - type - performance
LSI<->SEI<->EII
SEI<->EII<->ILI

But EII is what I'd guess, if I had to guess.