Any really good supporters out there who mind helping me improve my page?

I Run
x3 Avarice Quints (Im thinking of Swapping these for Health, but they really do seem to add up with masteries and GP5s)
x9 Armor Reds
x9 Armor Yellows
x9 CDR Blues

swap ur blues for MR and swap ur reds for magic pen. sona and taric are aggresive.

Flat Mr right?

For Taric, I run
Armor Marks
Scaling Mana Regen Seals
Scaling MR Glyphs
GP10 Quints.

With the armor he gets from his W, I feel that I can forgo the armor on the seals and get mana regen cause his passive is absolute trash.

Assuming you're not playing it safe and running gp10 Seals:

MPen Marks
Armor Seals
Flat Mana/5 Glyphs
gp10 Quints

If you want to run gp10 Seals, then run flat Armor marks instead of MPen marks.