If you're interested in another way to use those knight-centric cards, I have an effective knight tribal deck on my profile. Please leave any suggestions or thoughts on my deck in the comments page if you get around to checking it out, and hopefully it might give you a few creative ideas. ^_^

Mike, loving the improvements.  I've already made some placeholders to do exactly this.  Witchbane Orb is too mana heavy for me, but I'm going to also add a Tajic, once I get him.  What is great about blood lust, is that if it brings a creatures power to less than 1, it makes it 1.  :)  Working on an opponents creature is just gravy.  I definitely want some silver knights in here, but I'll consider the others you mentioned.  thanks for the help!

This is an interesting RW bent you've made here. My comments/thoughts:
1) Swap Uphill Battle for Blind Obedience. You get the same effect for cheaper (1W) and have the extra benefit in Extort for games that go longer.
2) Drop Pledge of Loyalty and add Brave the Elements. Your Vulshok Refugee won't benefit from the protection, but he's pro-red anyway. This will also make your white critters unblockable.
3) Drop at least one or two Circles; they will get redundant. Consider Witchbane Orbs for hexproof vs. simply pro-red.
4) If you're looking for pro-red, consider Kor Firewalkers, Burrenton Forge-Tender, or Silver Knight.
5) If you're looking for more targets for your Exemplar, consider Blood Knight, Knight of Glory, or Knight of Meadowgrain.
6) Are you looking at Blood Lust to function as both a boost to your guys plus removal for your opponents? If it's for your guys, remember that any indestructible critters that have less than 1 toughness still go to the graveyard. If it's for your opponent, you may wish to go with simple instants that can damage both critters and players (beyond what you already have with Slagstorm, et al.).