There's nothing really considered cheap in wifi besides that going-first-in-map-3-blocking-the-exits-trick.
The problem with using lots of paladins and fliers is that they have low speed caps, and will be picked off easily by faster Snipers, Horsemen, Swordmasters, and Berserkers. They might get in the way for a turn, but they'll be dead the next if you're not careful.