Any easy methods to max Insight?

Not like maxing Insight actually gives you anything.
Accuracy, Avoidability, and the ability to reveal hidden potential without magnifying glasses.

Not that I don't want to do it, for completion's sake, but I'm not working too hard on doing the daily cap every day. Only level 66 now. I'll get there some day.

After Unlimited, magnifying glasses aren't even needed. You just tap the magnifying glass icon in your inventory and it charges you meso through that rather than buying them in a store. Having more Insight would mean you don't lose any meso for it though.

I've been getting 500 insight/day with the Evolving World, rare item core + any equip core and it doesn't take long to max it.