While we're talking DSP combos, Rising/Ruby Zenith Strike (Scarlet Throne 2/5) and Descending Sunset Strike (ST 8) paired with the Martial Charge feat will multiply the damage of a Momentum Crash/Crush or Devastating Momentum (Primal Fury boosts, 2/4/7). Adding 20 damage to a charge an unlimited number of times per day at level 3 is pretty good, especially when you also get your normal weapon damaged doubled on top of that. Less unlimited, but more burst, is the strikes comboing with the Battle Fervor feat since that converts die into a fixed number subject to multiplication. Battle Fervor can reach insane levels when paired with Fey Foundling (+2 per die of healing magic) and Planar Infusion (HD in extra healing). Paladin 10 with those three feats and martial training 1+2 is dealing ~75 extra damage on that strike.
Edit: First party material:
First Skill Unlock for Stealth stacks with Expert Sniper feat to remove the penalty for sniping (hiding while making ranged sneak attacks) since both reduce the penalty by an amount instead of setting it to a lower value.