The Circle of Order arcana (Disciple´s Doctrin) is a weird one: A +1/2 Magus level dodge bonus to AC against chaos-related effects (swift action, 1 point, lasts until beginning of next turn). In more focussed campaigns (say Kingmaker, RotR, WotR), that's actually a good defensive arcana.

So, Mythic Adventures...

"Godlings" are an option from Mythic Origins. As usual, Desna is the interesting one here by giving the Throwing and Return qualities to a weapon and resolving interactive attacks as the weapon "bouncing" to further targets beyond the first. The way this SP is worded is interesting in regards to spellstrike, as it would mean that all targets are affected by one spellstrike.

Juggernaut is actually a fun Champion path ability for a STR-based Magus by letting you make one free break object check (doors, cover, walls, etc.) as part of a charge, with a +10 bonus when you expend a MP.

Mortal Herald grants access to one domain and it costs 1 MP to use one domain spells as a SLA.