BTW, my current 75:
I do not like bringing generalist cards like Mangara, Flickerwisp, and Revoker from the side, so whatever I am going to use is going to be in the main.
D+T has recently become a slower deck, and I find myself digging my way out more often than before. While Mangara is good at that, he is slower at it than Banisher Priest and Relic-Warder, both of which also attack while Mangara does not. Taken as a whole, this has done some work speeding the deck back up for me. I have definitely benefited from this switch.
I do not really feel bad about going to three Flickerwisps. I fetch them so often that I have had little trouble having access to flight. And I do not want to draw too many too soon, as they are slow. They are also a slight strain on the mana supply. (I may have to finally drop to 3 Karakas, but I have swapped Horizon Canopy for Cavern of Souls.) The 3rd Revoker is missed, and its absence is part of the slowing of the deck. It is the 61st best card for the deck imo.
What I would really like is a 2-mana removal spell to accompany Prelate so that I feel confident summoning her while the opponent has a Delver or something. This scenario happens frequently, and I do not like my current options.