Made top 100 in October using this list almost exclusively, so it has some punch. Combrei has some really strong aggro cards, but my list focuses on being as aggressive as possible. As a result, my list caps out at 3 costs and ignores the market entirely, so the game is a race from turn 1. There are some really amazing cards that are must include, but basically all Combrei lists have them, so I don't have anything special to add except to say that
Shen-Ra, Unbreakable and
Varret, Hero-in-Training are irreplaceable, so just pony up the shiftstone.
Let's talk about the less obvious inclusions. First up is
Xultan Brushfang. The card is starting to see a bit more play, but it had been completely ignored. However, the reality is for a hyper aggro list, we need a 1-drop and haviing a relevant mastery is quite good in Combrei. The card isn't the best 1-drop, but it's quite good enough to make sure you can consistently hit the board on turn 1.
Relentless Deadshot is suprisingly good in aggro lists because of the stun ability and the lifesteal where matches are often close and decided by just a few points of health.
Finally,
Soothing Shortbeak is my personal choice for a evasive finisher. Having a flying unit is really important because the games are often so close, and the curses are also relevant for making trades more difficult and pushing just that little bit of extra damage to get you over the line.
Let me know if you have any questions or suggestions. Good luck!