You have fewer spells than a wizard, so focus on "buffs" and "touch attacks."
If you want a specific level-by-level feat and spell list for one of the two example builds (Dex or Str), tell me which and I’ll produce a detailed 1–20 progression table. pathfinder kingmaker magus sword saint guide
Improved Unarmed Strike (Pre-req for Crane), Crane Style. Level 7: Outflank (Crucial for melee parties). You have fewer spells than a wizard, so