Long Sword is a possible option for Sacred Fist through the Follower of the Sovereign Host and the Whirling Steel Strike feat. But you'd also want to take Knight's Training, and now we're talking two feats for a feat starved class. Also, personally, I'd rather have the 50 PRR from Heavy Armor and not be restricted to 50 MRR. Even on a first life hardcore SWF Paladin, 267 PRR and 169 MRR is achievable. Giving up 35 PRR (net) and 119 MRR for Evasion is not worth it. Plus, the non-Sacred Fist has access to Divine Might for higher damage and tactics, and an insta-kill at T5.