Honestly I would prefer he marries Nyssa and pass Not Damian as hers than to force Talia to marry Daemon... She would marry Daemon if Ra demanded : Probably yes. The Twins would be safe with her around? Propably no.More seriously Daemon could marry Talia....be very messed up but not impossible especially if her dad makes her. Would anger certain people Daemon cares for but that hasn't stopped him before.
Lara Lannister is still the best option for Daemon and I and Funhunter shall perish on this hill.