Could you clarify the kind of environment in which you play? I got the impression that it is essentially a Vintage-style metagame with a variety of fun, but not competitive ideas being thrown around. You mentioned that Null Rod was frequently useful and it appears that your play group doesn't object to proxied moxen, so I imagine it's a fairly high-power environment.
It runs the gambit. At the smaller ones I go to ou'll see a Ichord, A storm combo, gifts, stax, dragon. None of which are 'optimal tmd net decked' builds, but not too causal. And you'll see an elf deck, mono red burn, and other 'little kid' decks.
The other events I go to are the Toronto area Mox tournys. Which are alot more competitive.
The event (a Library of Alexanda toury in Oshawa) I took this to I played agaist some real decks, and managed to beat a CS deck to top8 (I road the win on the back of permision and Nulrods.
Myself, I'd rather take this style of deck to it's conclusion, not it's logcal one (which would be drop green, and run standard fish.)
You said that you occasionally have trouble because Dark Confidant hits something with a high casting cost. Sylvan Library is good at preventing that, but Sensei's Divining Top may also be useful to you. If you think that you would like to run it, I would recommend using one in the place of a Brainstorm (Top behaves a little bit like a repeating Brainstorm) or in place of a Meddling Mage. Depending on just how casual your metagame is, then a card that relies on predictability is going to be nominally less useful than it otherwise might be.
I dislike top really, while it is a brain storm on a stick, I feel it's too much of a mana sink, and I generaly don't have much mana free at any given moment..
