Those Crusader builds look good on paper but I really need to see them in action first. And I'm talking about multiboxing action, not SOLO cause the problem I've always found with Steed Charge is that u cant do shit while on it. I mean, u cant cast skills and if u round robin laws for example, u end up dsyncing cause the one that casted a law will cancel the horse while the others are at max speed. I copied that diablofans build to d3planner and doesn't look that good for multiboxing:

http://www.d3planner.com/742382823

I like the idea of running around with the horse and killing stuff, but I hate CC and this build seems vulnerable to CC which will get u dsync. AC has 18 secs cooldown :/ Sure u will blow all your cooldowns on elites, but its fairly easy to run into packs before your cooldowns are over. Prolly add Leoric Crown and ditch Death Watch Mantle for Gloves of Worship.

As for Sage's, its a matter of taste I guess. For me its at least 30% faster. Dont see why not use it. Besides there's something really annoying about stopping to loot just 1 DB. Solo, why not? 4x chars? Naaa, I rather make that stop count for something more than just 1 DB.