TLP aren't the most consistent clan and perform rather average in F2P. Fi's performance on the other hand is debatable.. Given the right leaders/members they can be a powerhouse but as of recent days, they are far from it. Also made mistakes in their last fullout so perhaps the odds aren't in their favor.
Supremacy's former Hi members may pull through, having past experience in 2v2's. Rd on the other hand have a bad, recurring history of losing to clans down 20-30 (Sv, Fi, EoP & Foe) - although, those losses involved numbers outside of their 'core' 60 members so they could be a good combination with Sup.
A smart, safe bet would be Fi & TLP but I'd be putting mine on Rd & Sup.