If you want to talk numbers, Id say 8-10 pieces of mana ramp is a good number to aim for, but thats very arbitrary
Angel of Vitality also combos nicely with Bishop and Resplendent Angel
Cast it on turn one, activate on turn two and swing for two damage with our 2/2, then activate it on turn three and swing with a 4/4, and on turn six you can turn it into a nightmare for anyone, although you may not get that far
You then start the next dungeon
Since most of your pieces are enchantments or artifacts, one of these coming down can wreck your entire gameplan
Its clear to see why these are considered the best, but that power comes at a high mana investment and sometimes, in the case of Winds of Abandon, a downside