If memory serves, the lion's share of treasures are locked off to you until post-game because they're behind the harder silver blocks you need the hardest drill bit to get through and that drill bit doesn't unlock until you beat Croog. Since you essentially need to play through the game twice with the current ruleset, consider this:

Start on a save with the game completed and all extra maps/drill bits bought, you can open your treasure menu to show you only have the Red Diamond in your treasure list, time starts when you select a stage and confirm, time ends when you finish the stage of the last treasure you needed.

While this does remove the chip collection aspect of the first run, it might make it less daunting to anyone looking to run this category. As soon as I hunt down the right version of VBA allowed for speedruns I could probably do a playthrough to make a save for this if there's interest.

Edit: Also, should I just get all of the health upgrades or leave it at default? I would assume i'd get them all but I don't know.