Which Runes&Masteries do you guys use on utility support?

Marks: 9x Flat Armor Seals: 5x Flat Health and 4x Flat Mana Regen Glyphs: 6x Flat MR and 3x Flat Mana Regen Quints: 3x Flat Armor Quints

Masteries: 0/9/21 or maybe 0/21/9 against a strong all in like Leona

Running 21 armor makes heals more effective and these champions don't do that great with magic pen, Sona used to before the rework but I really don't think it's that good on her now but I don't play her post-rework very much so I could be wrong. Mana regen is great on Nami and Sona.

Marks: 9x Magic Pen or Hybrid Pen Seals: 5x Flat Health and 4x Flat Mana Regen Glyphs: 6x Flat MR and 3x Flat Mana Regen Quints: 3x Flat Armor

Masteries: 0/9/21

Marks: 9x Flat Armor Seals: 9x Scaling Armor Glyphs: 9x Scaling MR Quints: 3x Gold Quints

Masteries: 0/9/21

I change my runes from time to time but so far on these champions this is what I'm using currently and it works great for my playstyle.

Another possibility is running AD runes. We've been seeing it at Worlds a lot on Janna, and it allows you to push a lot easier.

Hybrid pen Marks, Armor Seals, MR Glyphs, Gold Quints. I see some high elo guides suggest Health Quints and Mana Regen Glyphs but I haven't tried that because I spend my IP on champs more often than Runes. I usually use to complement the Gold per 10.

If I'm vs. a melee support or something I can poke to death in laning phase easily, I just use my AP Rune set with Magic Pen Marks, Armor Seals, AP Glyphs and AP Quints for max harass/heals/shields. I usually use to complement the AP.

Depends on support. One option I use a few times is (mainly Soraka) 9x Flat Armor Marks 9x Scaling Armor seals 9x Scaling MR glyphs 2x CDR glyphs 1x Gold Generation

For aggressive supports (like Thresh and Leona) 9x Magic Penetration 9x Scaling Armor seals 9x Scaling MR glyphs 3x Gold Generation *I use scaling since most games I'm in, fights don't start until around 6, where scaling beats flat runes.