I mostly really like this idea for a Magus but I worry that the subclass features don't balance off each other well. The class Hope feature lasts for an entire scene and gives a large repeated damage bonus. Every core class Hope feature is single action based. Playtest Blood Hunter being the only exception but it has a conditional burn out. At foundation level: Spellshot has a that greatly increases the class Hope feature damage for the entire scene it's around - that's extremely potent. Magister uses 1 hope for a very small reduction to damage, on a per attack basis. Past foundation level they seem equivalent, but that spellshot ability is to potent it makes the class combined with this subclass seem potentially overtuned. The third inscluded subclass seems about 'right'. Retuning spellshot and the Hope feature would bring this class into parity, though Magister's foundation feature, similar to but weaker than the Arcana Rune Ward domain card, is so minor that it's unlikely to ever have notable impact.