Churchill Downs, the home of the Kentucky Derby. Getty Images Some years, the Kentucky Derby is straightforward to handicap. You have a chalky favorite, like Justify in 2018, and you’re just trying to figure out the best horses to use underneath to add some value to your exactas and trifectas, knowing that there’s no point in trying to beat a juggernaut. This is not one of those years. Renegade was already pegged as a lukewarm favorite before last weekend’s post position draw, and the skeptics only grew louder when Mike Repole’s colt was drawn into the dreaded No. 1 spot, which hasn’t produced a winner since Ferdinand in 1986. No. 6 Commandment and No. 18 Further Ado were co-second favorites on the morning line, but both look like they could drift into the pack as trendy horses like No. 8 So Happy and No. 9 The Puma take money. Other potentially trendy horses include No. 15 Emerging Market and No.…