Your build lacks sustainability. That's a big issue for Taric. Taric is not designed to damage, he's designed to support the team while also being able to take some hits. Your build completely ignores his support role in favor of some low level damage. For this reason, I must down vote you.

Work on getting some Armor, MR, Health, AP and other bonus things like regens to improve your play.

It does, in fact, stack. But only on separate gold per 10 items. Meaning I can have a Philo and HoG, and get both benefits, but not more than one philo or heart of gold. I have confirmed this.

i like the trininty force. i tried it out and it worked wonders with taric for the simple fact that he needs a bit of everything. im questioning all the Greed items. first off, the gold build up doesnt stack. secondly, the items they build into would not be the best on taric in some cases. if your building TF you want to be looking into more utitiarian items.

It's interesting. I've been recently experimenting with TF on Taric and I'm quite pleased with what I've found.

I don't doubt you've found legitimate success, but I can't shake the feeling that you'll find more success in rushing the TF after your Gp10 items.