Your damage could scale even harder than the calculation above too.
You’d do this by adding other multipliers such as “Fire Penetration”, “% Damage As Extra Added Fire Damage”, and Fire “Ailments” such as ignite.
Not to mention critical strike chance (& damage), hit rate, weapon choice, and more.
On top of that, there are “skill gem interactions”.
Skill gems in PoE that share ‘skill tags’ usually interact with each other in ways that can matter a lot.
For example, any Support Skill Gem with the ‘attack’ tag will scale or reduce or somehow affect the other ‘attack’ skill gems.
Some casual players don’t pay attention to these tags even after hundreds of hours.
The point is, whether you’re playing around with gem tags, or upgrading your weapons…
…most builds have many ways to scale damage.
u/noicreC points out that:
“Every skill has it’s own way of scaling. Damage Over Time builds don’t benefit from penetration. ‘Secondary damage’ doesn’t benefit from ‘spell damage’ modifiers, even if it’s a spell. Looking up what affects your skill and what does not can be very helpful so you don’t waste many passive points for no gain.”
And there’s no point getting caught up in Path Of Building damage numbers every youtuber uses as clickbait.
What matters is how your play, on your character, in your game… feels.
Note: u/Archieie that any debuff that modifies “enemy damage taken” (such as Wither, Shock, Maim, reducing enemy resists, and so on) can be very impactful. These are a bit rare and often overlooked by casual players, and worth adding to your build.
I’ve played countless builds with high PoB damage numbers that just feel weak. I got tricked by the flashy numbers sitting in the high millions and billions.
Don’t let that happen to you.
Instead, pay close attention to how your build feels to you, damage-wise.
So if you’re mapping (or leveling) and it’s taking you too long to kill monsters or bosses, you should “feel” it quite quickly, and immediately start looking to acquire more damage scaling modifiers on your gear & gems, or look to bump up the numbers on ones you’re currently using.
Ultimately, if your damage feels low, despite being a casual, it’s worth reading up on damage scaling a bit. I’d start with the maxroll post Path Of Exile Damage For Beginners.
At the very least head to r/PathOfBuilds and search up how to scale damage on your main gem or overall gear.
(And don’t get caught with your auras off and your curses down, a sure fire way to cripple your damage that could’ve been solved with a click.)