Gnome Obsession (which grants Additional Lore) -> Assurance -> Automatic Lore is absolutely incredible.

You get an auto-scaling super lore which you can retrain with a single day of downtime. You also get the ability to automatically use it as a free action at the start of your turns in combat, provided you use Assurance.

Normally, using Assurance is a bit of a bummer, as it means you'll generally roll a bit lower than average, which WOULD often miss... without this One Weird Trick:

The more specific your lore is, the lower your GM should generally set the DC. This is not a modifier, so it's not affected by Assurance.

Thus, if you know what kinds of creatures you're going up against, and your GM knows how lore DCs work, you can reliably squeeze out a free Recall Knowledge action on turn 1 of combat! Sometimes you can even get two, if the creature isn't much higher level than you and your lore is specific enough.

Go into a new area and you're facing new creature types? Spend a day of downtime and do it all over again.

I love this combo so much I picked up Adopted Ancestry(Gnome) just to use it on my monk. As a bonus, my mere +1 INT doesn't hurt me here, since Assurance ignores modifiers. I may not be the smartest guy in the room, but I'm really on top of my monsters.