I think that's a great idea! 40 replies may sound like a big number at first but I think it can be fulfilled without you even noticing. As for me, my goal is to make 10 replies/day but I usually get sucked into this "replying frenzy" and exceed that 10 with ease.
I'll give you a follow there and keep in mind that content thing!
I think reply-guy mode is the way!
It is the way.