Magus also gets Holy/Axiomatic (or Anarchic/Unholy, depending on alignment) with Divine Weapon Arcana. Of course, there is a choice involved. You probably want Bane at 15, so at 12 and 18 you need to choose between Divine, Ghost (also includes Brilliant Energy), Dimension Strike (boss killer, resolve attacks as touch for 1 round) - also Spell Blending if you have EA mod (particularly on SS) - but then you can also pick Extra Arcana feats.
Brilliant Energy is not nearly as nice as I had hoped BTW (but Ghost Touch is great late game).
Unless I’m mistaken, you have to spend a feat on enduring (and an arcane point each time) just to get to the paladin base duration.
Not a feat. You spend Magus Arcana - and Magus gets those at levels 3, 6 (Enduring Blade already available), 9 (SS doesn't get this), 12, 15 and 18. With EA mod you can also get Extra Arcana feats. Besides adding those various unique weapon enchants (stuff like elemental, keen, Speed is available by default), you can also get some other stuff, like resolving attacks next round as touch, making enemy flat-footed next round, casting stat added to attack rolls in next round or using some metamagic 3x per day freely. EA adds additional Arcana choices, such as familiar, spell blending (allows learning up to 2 extra mage spells).