Efficacy
Why bring a weaker dd, as opposed to a broken one? Sure ppl can try/do the bst strat, however, the chance of success is much higher with sams or rngs, because they are superior dd. Bottomline is this; sam and rng > bst. This is what the argument is about. Sams are better dd than bst; regardless if you get imaginative and clear a delve with dead ppl and red hp. Pets have crap acc and weak ready moves; why bring corsairs to buff them as opposed to a superior REMD dd? Sam and rng are better dd than bst and nearly everyone else; this is the argument. As a result, they are more efficient in endgame.