Scale length question

Hail, fellow fans of too many strings!

Quick question - looking to tune down to 8 string territory on a 7 string (tried 8 but it was a stretch too far for my inadequate paws), would you recommend a longer scale for this? Seen a tempting ESP LTD TE-407 listed locally but worried 25.5” scale wouldn’t cut it way down in F#, all thoughts welcomed.