1. Typhlosion - add Mew EX, it makes this a much more viable deck. Typhlosion's problem is that you can usually only get 2 or 3 Typhlosions powered up. Adding 1 more attacker actually almost puts this in the tier 2 category.
2. Yanmega Break / Vespiquen - Definitely a deck with good upside, esp. since Greninja is weak to it, and I think Greninja has a real good chance of being the BDIF (see below). I've only gone up against it twice this month, but I lost both matches.
3. Serperior - Sorry, but I only went 6-8 in testing with almost this exact same deck list. It's a fun deck to play and I've totally fallen in love with Servine, but it's just not a top tier deck.
4. Greninja - Definitely a top tier deck, could very well wind up being the BDIF. So Greninja is a real mystery to me. I completely wrote it off when I went 14-7 against it in the first month of the new rotation. However, after going 7-23 so far this month against it (1-14 in the last 15 matches), I have gone over to the Water Shuriken side and invested in my own deck, and I'm 7-1 in 8 matches since yesterday - which is still too early to make a definitive claim that this is BDIF, but it's definitely in the running.