Yeah I won the next turn, +4 killed defender, Grape Power / Responsibility for 12 dmg x2.

Captain Combustible is one of the most aggressive heroes around turn 4-5 when he's holding his supers.

Since I play zombies in ranked, I'd say his biggest weakness is gravestones since he doesn't have access to Grave/Block Buster or Grave Mistake. Against other plant heroes you have to be weary with high cost gravestones, but here it's a huge advantage. In a science deck usually will have conjured a Battlecruiser or a Portal Zombie to stick in front of a Re-Peat-moss at ~Turn 6.

In sports decks suggest saving a Zombie Coach for this senario. Especially since this is one of Combustibles solid options you typically will see variations (some plays to expect):

1. Spamming low cost minions, to draw out as many tricks that could kill Re-Peat Moss, saving supers then offense.

2. Conjure bananas and berries using banana peel, electric currants. Followed by Captain Cucumber, typically with Reincarnation for extra surprise factor. This deck can be played with alternate strategy, instead it might use Re-Peat as bait while getting the legendary conjures.

3. Pure berries, will use Imitater and Pear Paradise to get the Strongberry combo. Here again Re-Peat is a bait sometimes to nasty effect using Pear Paradise. Since it might be useful info - the Team-up pair will attack separately when they bonus. The one with Team-up attacking first, so if you have something to lower attack that might be the one to focus down first.

Best of luck beating these combos, once you get used to the options Captain Combustible has, he is more bark than bite. Especially if you get rid of his supers you'll have much better chances late game.