Originally Posted by
Xorn
Saving just 1 for Combust seems silly to me, because here's a timeline of combust if you have all 3:
**Combust**
0.0- Pyro -> HU
1.5- PF -> HS
3.0- Pyro -> HU
4.5- PF -> HS
6.0- Pyro -> HU
7.5- PF -> HS
9.0- Pyro -> HU
**Combust Ends**
So that's 3 PF at 350% damage, plus the 3 splashes at 150% each and 4 Pyro at 300% each, giving us a base damage of 2700% damage, before factoring in crits or extra mastery damage.
Here's the timeline if you don't have 3 charges and start with PF:
**Combust**
0.0- PF -> HS
1.5- Pyro -> HU
3.0- FB -> HS
5.25- Pyro -> HU
6.75- FB -> HS
9.0- Pyro -> HU
**Combust Ends**
That's 1 PF at 350% + splash at 150%, 3 Pyros at 300%, and 2 Fireballs at ~135% each. Grand total: 1670%
It's clear to see that stacking those within Combustion is the clear winner in terms of burst damage, and I'd be willing to bet money that the potential "lost" crits from PF don't outweigh the damage difference in the long run. You want to stack you hardest hitters under your biggest CDs. Always.