By the time you're done constructing your fort, you likely won't have much further to go to close the game out
Something is bound to hit, and the gains from discovering that and restructuring around it will be huge.
A similar argument can be made for Maester SeymourMaester Seymour, which clearly isn't nearly as good without becoming monstrous
And with Tarkir: Dragonstorm introducing new utility Dragons like Runescale Stormbrood and Scavenger Regent (Omen spells attached for extra value), Tiamat's "choose five" is more stacked than ever
6 Chip n Dale - Recovery Rangers 205/204, Amber Normally a Rare Amber card, this Enchanted version hones in on the adventurous side of these characters
You can also ramp by discarding a card and untapping a Gilded Lotus, which generates more mana