This multiple choice poll is very nice, and the ability to look by HP not only vote count is also super amazing, I LOVE IT.
But as for Peakmonsters, I use mainly the "My collection" page and the "Explorer", for things like combining cards and harvesting land, I use the Splinterlands ingame interface.
It's just how my routine has come out in the multiple years of playing.
One thing that Peakmonsters in my opinion is superior from any other platform is rentals and bids, but it's hard to back that claim by myself since I haven't done any renting in years, but I do sell my cards to bids sometimes when I want quick money.