So I came upon a bit of evidence that I see as HUGELY in favor of Selorin/Vade. It's in chapter 126:
Unable to catch Anikira’s attention, Orinakin shot Bade a look.
Right, Bade agreed. Then he hesitated. What?
Orinakin shot him the look again.
Bade blinked at him, mind blank. I… You want me to... He glanced down, checking his laces.
Rolling his eyes, Orinakin found Selorin, shooting him a look.
Selorin glanced at Vade.
Vade frowned, baffled.
Selorin did it again.
Vade felt so perplexed, Orinakin almost laughed.
Selorin gave Vade a look, tipping his head slightly to one side.
Vade’s comprehension flooded Orinakin, and Vade looked at Bade.
Oh! Bade turned to Anosanim, touching his arm. “I like your bracelet. Is it new?”
I think it's very telling that when Orinakin couldn't communicate something specific to Bade, Selorin was able to do it with Vade. More than that, Orinakin knew it and using it was his first impulse.
Just one more datum in the "Support for S/V" column.