This sequence wouldn't work with the auto sequencing because that turns the transmit off after the 73.
What we need is a two letter code in the CQ that means SOTA. For example perhaps we could do this:
CQ ZZ G4TGJ IO93
G4TGJ N1EU FN32
N1EU G4TGJ -5
G4TGJ N1EU R-2
G4TGJ N1EU 73
We'd know that CQ ZZ (or whatever we choose) was for SOTA and so would be expecting the summit reference. My only concern with this is that non-standard messages can confuse WSJT-X and it logs the wrong callsign. This might also be an issue with the slash in the reference - this might be interpreted as a callsign modifier.