Hmm... might be a bit much, since the effects reproduce several spells (bladed dash, force hook strike) that appear later than level 2. And force hook still risks aoos.
On top of that, with the right ray, you could probably go 100's of feet per turn, which is a lot, and not even allowed by high-level abilities like dimensional dervish.
I would probably recommend one move per casting of a ray spell, along the line on ONE of the rays. and even then, I would make sure to put a limit like "the movement cant be more than twice you base speed" (since all similar spells also have limits).
It sounds cool, but it's cramming a lot of abilities that normally arent allowed until after level 10, so it's going to be hard to balance.
Well, I've never considered spellstrike to be the "core" of the magus (arcane pool & spell combat are the core to me) but there needs to be a limit, if only because all similar effects do have one.
I'll have to reflect on this. THere are several good ideas here, but the need to be refined.
Note: Not provoking AOOs is a bigger thing than you think; all other examples I can think of limit you to 1 movement (bladed dash, teleport spells (like dim door & teleport)).
Another thing to consider would be to limit that amount of times that your magus could move as part of casting a ray spell by an amount equal to your magus level divided by some number or other. Say something like this:
At 2nd level, when a Spell Rider Magus casts a ray spell from the Magus spell list, as a free action, he may move up to twice his movespeed in the direction of the closest adjacent cell to the target of the spell. This movement provokes attacks of opportunity as normal.
A magus can do this once per round at second level, plus another move per round for every four levels beyond second level, to a maximum of five times per round at Magus level 18.
Ray Dash (EX): At 10th level, the Spell Rider increase the amount of movement granted by the Spell Rider by 20 feet, plus another 20 feet for every 3 levels beyond 10th.
This feature replaces Spellstrike.
This is just how I would personally space out this homebrew archetypes abilities, so feel free to use this template or not at your discretion.
It would be cool if you sort of teleportted or something.
Honestly, I would have spell ride replace Spell Recall or Spell Combat. I suggest spell combat because that would mean you're trading an action economy ability with an action economy ability.
At 1st level, a magus learns to ride projectile spell effects in order to charge at his foes. As a full round action, he may cast a spell with a casting time of 1 standard action that requires a ranged attack roll. As part of casting the spell, the magus may charge the spell's target and make a single melee attack with bonuses and penalties as normal for a charge. This movement ignores difficult terrain, but the target must otherwise be a valid charge target. This movement provokes attacks of opportunity as normal.
This replaces spell combat.
Alternatively, consider spell recall as it is a very "safe" ability to replace. Spell recall is powerful enough to justify the strength of your archetype ability. In addition, it's not "essential" to a magus whereas many players would never trade spellstrike and spell combat unless they're getting similar benefits.
A spell pounce would be kind of overpowered, though.
This looks really great. A magic warrior that travles via his magic attacks. Yes please.
I am not concerned by the power of the almost pounce. Spell strike us a very good trick to give up.
Only way i can see this AT really blowing down the house is if he manage to get a decent number of natural attacks or take a Munk dip for a fit of flurry. Natural attacks an unarmed attacks already have a Spell strike like effect.
Try it out like it is and tell us how it goes.