I just T8ed at a local GPT and thought id share my list...
4 wild mongrel
4 aquamoeba
4 basking rootwalla
3 deep analysis
2 roar of the wurm
2 intuition
2 wonder
4 careful study
4 circular logic
3 daze
4 arrogant wurm
2 merfolk looter*
4 yavimaya coast
1 centuar garden**
6 forest
9 island
2 chrome mox***
Sideboard:
3 Naturalize
1 wonder
1 roar of the Wurm
3 rushing river
4 Energy flux****
3 water front bouncer
i went 4-0-1 in swiss rounds (last round guy thought he could beat me, boy was he wrong) and was top seed in T8, but lost to mono-red goblins. I think if i had boarded chills instead of Energy Flux i could have won that matchup.
i stared questionable card choices, and will explain them and why i didn't run some cards discussed.
*I ran the two looter because one person at the GPT was playing "Fish", a U/W control deck with gush, foil, daze, lord of atlantis, meddling mage among other things. And i felt like the negatives of two looters did not out wiegh the possible postives, but this choice had no effect on any matches.
**Centuar garden was another one of those cards that i felt had a tiny down side compared to games it could just win for me. It lost me no games from the life loss, but won me a game vs the rock in round 1.
***some people have been talking about not playing chrome mox, that is just bad. It was absolutely key in almost all the games i drew it early, and was just pitched to a aqumoeba later.
****Energy flux...

. Walking into the tournament i saw 3 people playing affinity decks, out of a 31 person field, and no RDW and 1 goblins. I should have known better, but i didn't board the chills, only to find out later that no one played affinity.
Now there were some questionable cards i didn't run
Genesis- testing proved that wasn't really nessecary in the 'tog matchup, and also that 'tog was not really viable
Gigapeed- I tested this because i had seen it in the forums, but it was crap.
Mask of memory- Would be absolutely godly in a control field, but the metagame was mostly agro.
After the tournament these are the changes i made to the deck
-2 looter
-1 deep analysis
+3 rushing river
i did this because my playtesting group and i felt UG is going to be a big part of GP boston's metagame.
In the board i did this
-4 energy flux
-3 rushing river
-1 waterfront bouncer
+3 chill
+3 submerge
+2 gilded drake
Just some minor changes.
Good luck at any ext tournaments you might play in with madness.