I have two
rolling thunders that are taking that big X spell role (though I suppose I could turn one of them into a fireball and don't need to break singleton there). The guy I was talking with about the R/G draft started off with a copy of
rolling thunder, with the intent of going R/G ramp.
I would be open to more mana sinks though in red. Cutting rock hydra for something else seems reasonable, I'm just not sure what. I just love rock's hydra's flavor...
Ring is actually a good idea, and goes well with the
fires of yavimaya that I snuck in (also cut a
pelakka wurm for a
saproling burst). I think I would need more midrange red beef though. Ashling always seems to result in these weird board states for me, so I think I actually like the more tame
molten hydra (which I think will actually play very well).
As far as expanding the black disruption package, I don't really know. Specifically, when I brought it up before, I was referencing how difficult it was to disrupt those sorts of
cloud of faeries based combos. The reason is that those decks are already running
archaeomancers to get back
ghostly flicker if something happens on that end, and also can easily run white or black raise dead effects to get back
cloud of faeries if something happens on that end. You can even blow up most of their bouncelands, and they can still use familiars to eek out enough of a mana advantage to kill you. I would really need to power up my disruptive package, if I wanted to encourage that part of the cube, but that would really change the texture and feel of it. I do think there exists the potential to take this cubes shell and revamp it into a combo focused format.
Generally, I think disruptive decks have to hit a pressure point of the format. The blue bounce spells do a nice job upsetting bouncelands (while not being poisonous), and the black equivalent would be terrible stuff like
mana skimmer and
mana leech. Cheap discard or land destruction creates negative variance, which I am not interested in.
Tainted Well is probably the least invasive choice, but any disruptive piece I would add seems to fit better in a UB shell.