Last Chaos Forum

Should be able to calculate it with this info Mazar Affinity - Last Chaos - Guides & Information

By "max out" I'll assume you mean fully maxed, and if so that information hasn't been updated in the wiki yet. If you meant enough to unlock the shop then the wiki will show that, otherwise you can easily get the information in-game from the Affinity interface (press J and scroll down to Affinity).

Also, the amount you get from donation items is also shown there, and assuming you use an Affinity Booster when donating, you just multiply the amount you get per item by 2, turning 300 into 600. Or if you have guild passive maxed on top of that, then you multiply by 2.1 instead of by 2, turning 300 into 630.

Knowing this you just open the calculator in Windows and do the very basic math needed :

your affinity goal / amount per item = items needed to reach goal

you would need 333,334 gold bars to completely max all Oscar affinity... taking into account that for each gold bar you need 3 imperfect stones you would need 1 million (and 2) stones IF you get all the stones into gold. sadly that's not likely. and if you're thinking of using master of processing materials then you would need at least 4 times that amount of stone. master only has a 25% success rate which kind of sucks, but if you do it yourself with the manual and have your processing skills maxed you will have 75% chance of success. so choose how you want to do it. master 25% chance but you can process 10 gold bars at a time if it works, or make it yourself one at a time with a 75% chance of success. either way it will take A LOT of tool aids for all that stone and you're gonna need a lot more stone probably. so good luck!

Quoted from "FeistiestSole74"

you would need 333,334 gold bars to completely max all Oscar affinity

Quoted from "Graut"

Quoted from "FeistiestSole74"

you would need 333,334 gold bars to completely max all Oscar affinity

Note that this is without Affinity Booster (166,667 with Affinity Booster, or 158,731 if also having guild passive maxed, and even less than that adding C2 cover buff).