A10 Aeonglass keeps wrecking me

I get to final bosses decent rate I feel

I generally save up all these potions for that damn boss. I try to get exhaust cards, but holy shit is it so punishing.

I could build completely for it, but usually that causes me to lose before I even get to it.

All other bosses I feel like I couldve done something better, but this aeon one it feels kind of unfair. Sure it can be beat, but its frustrating. The previous door boss felt more manageable to prep for

Is it me or is this one kind of bit too strong?