1st Wildfire - Everything will be up.
2nd Wildfire - Reload, Reassemble, Ricochet, Raging Strikes and Hypercharge will not be up.
3rd Wildfire - Everything will be up.
It repeats from there.
You use Reload, Reassemble, and Ricochet on cooldown, as it provides a DPS increase. Reassemble should always be used with an Ammo'd Clean Shot. Hypercharge will still be down when it's time to use your 2nd wildfire, and you have to play by ear if you want to use HC early and not have it for your 3rd Wildfire, as HC is a raid-wide dps increase, so it may be a bad idea to be "selfish" with it.
Basically, your 2nd wildfire will always be weaker than your 1st or 3rd wildfire.