no.
enemy life is set when a monster is spawned by you exploring the map tile he's standing on, which happens from about a 3 screen radius. As soon as you're anywhere close to him (minimap reveal distance), his HP is locked in
bind demon will store his P8 HP, but not his P8 damage
the aoe on his curse and radius/%ed/ar/ias on his fanat are dependent only on his level, which doesn't scale with P1/P8, just norm/nm/hell and TZ mode