After completing further research, it has become evident that going with the magus/dervish dance/ scimitar is not the slam dunk it used to be.
A couple things came to light recently as I am preparing to release my Magus upon the world:
1. Weapon Finesse & the Scimitar. Nope. Contrary to what everyone assumes, you DO NOT get to use weapon finesse with your scimitar while you are waiting for 3rd level when you can take Dervish Dance. You can only use weapon finesse with the weapons listed on the feat. Just because weapon finesse is a prerequisite for dervish dance, does not grant you the right to use your dex for melee attacks with the Scimitar. Sort of a big deal. You'll have to use a rapier or something until 3rd level.
2. You can NOT attack two-handed with Weapon Finesse or Dervish Dance. EVER. This is a big strike against this build for me. You will be using your Spellstrike ability as much as or more than your spell combat ability. With a strength build Magus you can deliver your spellstrike two-handed! For example: Shocking grasp delivered as a two handed, Critical Katana attack (2nd level, 18 strength, arcane pool active) = 2d8+14 + 4D6. With a dervish scimitar, one-handed (even though not even possible, see #1 above) Spellstrike (2nd level, 18 dex, arcane pool active) = 2d6+2 + 4D6. CLEARLY at first and second level the dervish build is gimped and for good reason.
It it true, as a Magus you could use any martial weapon to deliver two-handed attacks, but with no or low strength bonus, and no attack bonus from strength or dex, what is the point? And let's not even discuss when the strength build Magus rolls a crit using two-handed power attack with spellstrike. Sick damage. Frickin massive damage at 5th level.
I'm going to try a Half Elf strength build Magus centered around the Katana as my main weapon. You can attain the exotic weapon feat at first level legally as a half-elf with the ancestral arms trait(can use one or two handed, higher damage dice than scimitar) If I wasn't the sole spellcaster in our party, I'd probably go for the Kensai arch class which is pretty beast.
On a side note, Dervish Dance feels kind of cheap anyways unless you are playing that campaign setting it released with. I don't remember it's origins. Heck, you can't even pull up the feat on the PRD at all and that should tell you something.