So it has come to this acknowledgement: creature based mana reduction is bad.
Dragonlord's Servant, as much as I wish was useful, isn't helping. Fierce Empath is still pretty cool and there's a neat little combo that can come up with Swift Warkite, helping to fill my hand with useful tools.
But while I was gone I played several games against Fuz and Noah against almost all aggressive decks and what it came down to was: those creatures aren't as good at mana ramping as the green suite of ramp is.
Now, while that's as it should be, it is a little silly that it took me so long to work it out. So I'm callin' Radiant Flames back in to add to the removal suite. I'm also keeping in Bloodfell Caves and Jungle Hollow because the lifegain, while very small, is enough to blunt the worst of Painful Truths.
I also feel like I could use a different dragon: three Kilnmouth Dragons, as perfectly fitting as they are for this deck, seem like overkill. But I'm not sure where to go; dragons tend to warp towards cool, not win and as a result it's been challenging to find a proper fit in a deck that already has enough cool.
Finally, I'm not sure I can convey how discouraging it is to play Grand Coliseum. It's not even that the card is bad-although it isn't good. So I'm cutting that and at the moment, likely candidates are Flameblast Dragon, Balefire Dragon and Utvara Hellkite. Although Stormbreath Dragon can't be overlooked either. It may just depend on what I have.
If I have the money, a single Thundermaw Hellkite is also a clear winner.