So since I've completed A10 I've been running maps to finish "the Hidden Architect" quest. It seems pretty simple, just keep doing maps until the end.

What else is there for me to do besides running maps? I haven't really played with anyone and have mostly been solo. Looking for some tips on things to do post game to find Orbs of Chaos.

Are you playing on the delve league?

Delve if you're temp league.
Keep on mapping if you're standard. Assume you don't have mass currency for crafting.

Yes I am

then delve

Gradually work your way down to delve 270 for ilvl83 monsters, try to get your sulphite cap and darkness res up to max.
There are various achievements and challenges to work on as well, hit H and take a look.

this. it will be a long journey

smash maps like a maniac
delve like a maniac
obtain currency

and go as deep as u can, higher good node density the deeper u go. Personally I found 550-600 to be the comfort spot.

55-60 is mine...

you can also try and take down normal atziri or elder