Adam Demirjian

Seen playing dark green HSS Strat at Brave Little Abacus show

Seen here with the Surf Green Jaguar, which became his primary guitar in the final years of Abacus

Very burry when shown in this video, but pausing around 0:18 or 0:19 gives an ok look at his Tele, appears to have a humbucker neck pickup

During The Brave Little Abacus's final performance at the Vic Geary Center, Adam Demirjian uses the PRS S2 Mira Electric Guitar in the first few songs of the set for standard/EADGBd tunings, as documented in the YouTube video filmed by Ty Ueda and James Attridge.

you can see on the left on the image him using it

Adam Demirjian mentioned the use of an Ibanez 7 string with Steve Vai pickups as his main guitar on "Masked Dancers: Concern In So Many Things You Forget Where You Are" and shared a picture of the instrument on the Brave Little Abacus Discord server. After some digging I found the exact model he used, an Ibanez RG7620 with DiMarzio Steve Vai Signature Blaze 7 pickups.