I had all but given up on tech pens but gave them another chance this time because dammit, I enjoy drawing with them...WHEN they don't clog up.
I'm trying Noodlers' Ink and it's working pretty well. It doesn't dry and set as fast as inks I'd used previously so it's a longer wait time before erasing pencil lines.
I've been drawing on Canson XL Mix Media paper only because it was already sitting on my desk. Yes, I can be THAT lazy. But the paper takes a fine ink line pretty well, so I continue using it.
It does break down and start to clog the pen tip with paper fibers if I work it too much.
If I know I am not going to get around to using a pen for at least four or five days or longer, I empty the ink out, clean it with 99% isopropyl alcohol, then fill the pen with roughly 80% distilled water + 20% isopropyl alcohol.