Yikes. That De Atrementis ink was on my wishlist, but it’s looking kind of….limpid.
I have a Posca white paint marker I use for any little highlights, just for convenience. I saw a great video by John Muir Laws where he suggests the Pentel Presto! jumbo correction pen, too. (With the !.) It stinks to high heaven, but is opaque enough to blot out pretty much any mistake/bulk-fill any needed highlights. (I got the fine point, and it’s small enough to carry with me if I don’t want to tote along the more expensive Posca. I lose things easily. :D)