Use this build in-game
Build ID: 728378 - copy and import it in the Deadlock shop
man pyro tf2 still pisses me off (i play spy btw) the problem with this build is that you get super slotlocked real early if you're not careful. building firerate on infernus is good, but most pro players have been gravitating towards burst damage as to avoid getting countered by one 3.2k green item. this build still works if you know what you're doing, and you can shred in rift fights when you have all of your cooldowns up.
Recommended ability leveling order for this build