Char.Patk is what you see in your stats window. There are many questions I'll keep in hide like "what's mastery bonus?", "what's strength bonus?". There are some assumptions, but there is no first-hand info. We can only guess what is it. After all, calculation is already done for you, so you don't need all this math unless you estimate tatoo affection.
Now we come to Critical Patk. Generally critical hits are twice as powerful as normal hits. But there are more modifiers that that.
That is, you add +326 Patk AFTER all buff modifiers. It's not that much after all. I I were you wielding DLE I'd have like 700 PAtk that will become 3150 Patk under mentioned buffs. The add from critical damage SA will be like 10% to overall critical power.