Practically speaking, Arcana is solely used for initiation. Buy 1 with karma, then don't worry about it for a bit. Binding is a much better option, because having multiple spirits on-call is pretty useful.
If you're a druid, why so much LOG? It isn't doing anything of note for you. I'd say max your AGI and increase your CHA. It's nice to throw bullets better, and bind more spirits.
Spells. Armor is a bad spell, for two reasons: (1) it makes you glow, which gets you killed; (2) soak is cheap, and sustaining a spell for soak isn't cheap. I don't care if you do it for free, that means you're tying up a valuable sustaining resource with a bad spell, when it could be used for a good spell.
Resist Pain is ok, but I'm not sold.
Indirect single-targets are like guns that bite you. If you're good at guns, they're not worth it. Ball Lightning and Stunbolt, though, are absolutely worth it. The best element of damage, that's extra nasty vs drones, and a stun spell that can hit even the dodgiest spirits.
Just max your AGI and don't use a spell, because you have to cast it at Force equal to your rating, which is a huge pain. You're lacking in debuffs and utility. I'd suggest Levitate (since not everyone on your team can just turn into a bird), Hot Potato, Trid Phantasm, Improved Invisibility (better than normal as it works on tech not just living things), and either Chaotic World or Opium Den. Sterilize is also a very good utility spell to erase fingerprints and DNA from an area.
UNCOUTH IS A HUGE TRAP. Huge huge huge.
Get a mentor spirit. Raven and Seducer are awesome, I will say.
Don't get a low-rating SIN. Max your SIN. Get a sustaining focus so you can sustain 2 spells (Combat Sense and Increase Reflexes probably) without penalty, and then can cast a third. Get reagents, because they make magic delightfully broken.