Myrrh, Frankincense, and Steel: Kurald Galain's Guide to the Magus

[TiaC]

It looks like nothing in either Paths of the Righteous or The First World is particularly applicable to the Magus, although there is now a feat that lets you treat the first level of any prestige class as "+1 level of spellcasting" (as long as the prestige class offers that on at least one higher level). That may open up some options.

I would disagree with this.

The Bladed Brush feat on page 15 of PotR lets you use spell combat and weapon finesse with a glaive, as well as allowing you to remove its reach if you want.

A dip into Brewkeeper lets you turn all your buffs into potions and then drink them quickly with Accelerated Drinker or Potion Glutton.

Also, one PrC from elsewhere that could be nice is a Diabolist dip. It's easy to enter, just requiring you to buy a scroll of Planar Binding. The first level makes you harder to raise or resurrect, but you get an Imp Animal Companion at your caster level.