Base on my testing, pyro’s skill damage is absurd without 6k-7k Matk.
I would suggest to keep it simple, don’t focus too much on pyro to deal damage when you can do much more with elementalist3 and warlock2. You can take the concept of Ifrit but not practice on it.
You will rarely use pyro skill, which the priority will be Mastema > Frostcloud > PoA > Prominence > Hail > Electrocute > etc, on top you have to run around to avoid boss ground skill and getting some knock-back, you will lack of luxury time to cast everything.
I put hail and electrocute on least because without surespell/quickcast it became unreliable.
Enchant Fire lv10 (to add damage on top on every skill)
Firewall lv10 (low CD and fast burst, highest single target skill factor %)
Firepillar lv5
the rest put lv1 on them, flameground/flare/fireball.
There are either too low damage or too many overheat/animation to waste your time.