Looking to build a support type sorcerer, one that can buff/debuff as needed, help control the battlefield a bit, and do some damage if the need arises, although the damage part isn't her main goal. I'm trying to figure out a good bloodline for her, something that gives good bonus spells and bloodline abilities for a support type roll. So, coming here to look for advice! Any help would be much appreciated!!
The most fun I've ever had playing a full caster was playing a Human Sorcerer with the Arcane Bloodline. Between the favored class option to greatly expand spells known and the opportunity to really flex your meta-magic muscles made it the most versatile and effective overall caster I've played or seen.
Now, the character wasn't as effective in specific situations as others have been (such as those specializing in direct damage or in enchantments), but he always had an answer for everything.
Another option would be to choose a Sorcerer (again, recommend Human for the favored class bonus) with a bloodline you like for whatever reason (Draconic, Fey, etc.) and then take the Arcane Bloodline abilities through Eldritch Heritage feats. Doing this with the Fey-Sylvan bloodline for instance lets you add both an animal companion and eventually an Improved Familiar to the mix as well.
More specialized Sorcerers that have worked well for me have been Kitsune with the Fey Bloodline or Kitsune Cross-blooded Fey-Serpentine Bloodlines and a Human Draconic Sorcerer taking some levels of Draconic Disciple.
My recommendation for a good generic template when playing a support Sorcerer (Human Fey-Sylvan Wildblooded Sorcerer):
Feats:
1st - Eschew Materials
1st - Spell Focus: (your choice)
1st - Greater Spell Focus: (your choice)
3rd - Boon Companion
5th - Piercing Spell
7th - Skill Focus: Knowledge - Nature*
7th - Eldritch Heritage: Arcane Bloodline (Arcane Bond - Familiar)
9th - Improved Familiar (your choice - I prefer Faerie Dragon)
11th - Dazing Spell or Persistent Spell
13th - Quicken Spell*
13th - Improved Eldritch Heritage: Arcane Bloodline (Extra Arcana)
15th - Spell Perfection: (your choice - best if its something from your Focus school)
17th - Greater Eldritch Heritage: Arcane Bloodline (School Power - your choice, best to match with your Focus school)
19th - Improved Initiative*
19th - Expanded Arcana (9th level spell)
* Bloodline feat
You get an animal companion for protection, an improved familiar for utility, a much wider selection of spells known than most Sorcerers and some real kick in your school of choice without over-specializing.
EDIT: This is all assuming that you want to play a Sorcerer more than you want to play a support character. If being an effective support character is more important, I can make some really great recommendations outside of being a Sorcerer...
The advantage of Arcane is that it's more generalist. It's a solid choice.
Now, if you're trying to be more specific in your support role, you can consider:
Accursed (great for debuffing, but not that impressive otherwise)
Celestial (good summoning and protection)
Deep Earth (awesome in a dungeon-filled campaign)
Div (this just looks like fun, and you get Wish)
Dreamspun (excellent sleep and divination)
Fey (excellent combination of debuffers and movement)
Maestro (voice-based battlefield control)
Rakshasa (for when you want everyone to just relax and do as you say)
Starsoul (lots of area of effect specialties and stacking debuffs)