All right. Let's see.
First of all, running only 1 of the highest-stage in any evolutionary line is a bad idea. You run the risk of having it prized and therefore will be completely unable to take it unless you start knocking things out. Try to get each one to 2 copies each or (ideally) 3. A 4-3-3 (or 3-3-2) line will be optimal.
Definitely 4 Fossil Excavator. It's the only thing that can search for your Fossil trainer cards, aside from stuff like Poke Drawer +
(Stormfront). On that token you might want to run 4 of those as well. And since you're running some stage 2 lines, you will probably want to run more than just 1 Rare Candy - 2 or 3 should do nicely.
I'm not sure the Hitmon lines are necessary. Sure they're nice and can stall for a while (Hitmonchan is amazing with just 1 energy on him; you can just park him there and laugh as your opponent won't attack you), but overall you want to try to get your setup faster. A good starter for the deck is Jirachi, from either LA or RR - the former
moves any 1 card to the top of your deck; the latter
has free retreat and duplicates a supporter (and has a nice effect when it gets KO'd). I'd recommend the latter if you can get it. If not, the former will work fine.
For Energy you might want to run 8-10 of each, not 12.
As for other Supporters I'm not sure what you might want (having 2 Night Maintenance is fine though), but here are a few ideas of what else you can add (besides what I've mentioned above):
You don't use it to attack (although you could in case of emergency). You use it to get rid of cards you don't need so you can draw 3 or 4 cards and see what you get out of that. A 2-2 line is optimal, though you could get away with 1-1.
. It lets you move your Fighting Energy onto Armaldo. It doesn't offer as much support for Cradily, but in my opinion, Armaldo's by far the better one (since it blocks anything less than 70 - I used to run him myself), so you may want to focus on him.
, and/or Expert Belt
. Defender's more for Armaldo (so he can tank better in case your opponent drops a giant hitter), since with just 1, he neutralizes even an 80 damage hit. PlusPower/Expert Belt are more for Cradily so he can score that knockout and heal all his damage away. However, both of them can utilize these cards.
(or Celio's Network
). Lets you search for any 1 Pokemon in your deck. It's truly amazing. Luxury Ball
works as well - but it's a one-off, so don't run more than 1. But it is a Trainer, not a Supporter, which is good. They can't search for the basic Fossils, though.
There are more out there than just the ones I mentioned, though. Fossil cards are a bit quirky to work with since only a couple cards can search for the Basics (Roseanne's Research
can't unfortunately), and there aren't cards that offer support for Grass and Fighting at the same time (usually one or the other), but when utilized properly, the two LA fossils are forces to be reckoned with. Cradily's great for disruption, and a well-timed Drain Down can ruin all your opponent's hard work. Armaldo is more of the tank and prevents a lot of damage, letting him swing away to his heart's content.
Best of luck to you!