I'm game for either option! Fellwing kind of wants to support Stargaze in finding her old friend and ask some questions while at it before heading to the stronghold, unless the latter is on the way/closer. But she's not fussy either way.
The stronghold is closer, but I am perfectly cool with you heading to find Echo. You'll definitely get some answers either way, you'll just find very different things.
*Quiet yet audible coughing noises*
I know, I'm sorry. It's just I'm genuinely a little stumped trying to think of the opportunity Skobeloff has given his allies ^^;