Pathfinder 1E - How does the magus perform at high levels?

Haven't considered anything yet. My first objective after reading over the base classes was to try and get a gauge on whether the ones which caught me eye were feasible, then work from there. :) Reading quickly affirmed fighter and wizard being workable, but magus was somewhat unclear, hence this post.

I found the Dancing Dervish bard archtype, but not the dawnflower dervish. Is that in later supplement? And regarding the Dervish Dancing Magus, wouldn't that still focus on strength, or am I missing something?

Speaking of str-based, the Magus seems like it'd require 3 solid stats, a great strength and int, and a decent con. So my class choice may also depend on how my DM decides will be doing stats this campaign.

Where might I find the Bladed Dash spell?

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