Rogue 1 / Lore X , is up 2 skills on straight Lore.
Even though Caelic's Commandments were previous edition, mostly tongue in cheek ...
Personally I'm tempted with Know Cleric 2, but that's rather campaign + DM dependent.
Dip with Mystic , one of those n'th detailed tasty trinkets, works about the same.
If you have lengthy down-time possible, a Bard build that goes
Cha +2 , Cha +2 , then thinks about the Skilled Feat , is colliding
with training in new skills for cheap, relative to 12th level moneys.
Skilled feat is strictly an early game thing.