I don't get peoples obsession with a Taric Rework...
He's a solid champ. His kit is super balanced. And if you play him right, you can carry the shit out of your teams. Passive: A natural Cooldown reduction while fighting. Set yourself right and you will spam your abilities for the benefit of the many. Q: Up to 2 people heal. (Ally + You) Make sure your iniciators stay in the fray more time than they thought. Mega heal for yourself if you are front line/initiator. making it harder to reach your team cause your presence is still there. W: (This has other stuff im gonna talk about, but later) Natural armor boost for yourself and ALL your allies who are close to you. Basically making you and your team ADC resistant just by being there. with tha added bonus that Tanks and squichies go down faster after you go on the offensive with it. E: Most annoying stun in the game. A glitering ball of fuck you that stops all but an ulted olaf in their tracks. And for a bonus, a bigger fuck you if they are closer to you, making sure that you light up their asses in a truly outrageous way. R: Mini Nuke turned Radioactive: Get in the middle of the enemy, Blast their asses to oblivion, and now your team gets a radioactive boost to their Offensive capability to hit hard and go home.
Pros: Hes versatile in your build, he has a natural defence that balances his build for ANY need. Tank/AP Carry/ AD Carry (i have seen it, but never done it). AD based champs hate Teamfights that involve taric, because no only do they naturally do less damage, most of the time they HAVE to get close to him, on the chance he makes them useless. His solo laning is ridiculous (even if people wont admit it) and he has an advantage over some of the more damage oriented top laners (Especially if they are AD) After 6 he has a sweet farming boost
Cons: VERY high mana burn early game, play smart or die. Slow farming until lvl 6 , only aoe damage is his W, leaving him weakened early game. With no natural resistances agains AP, his early laning against ap based champs is horrible (Extreme caution necessary)
The best combination i have seen, was when an enemy went full AD and our teamwork made them cry. Our team consisted of
VS
They wouldnt dare teamfight us after the first 3 times, so we picked them off when they split, forcing them to surrender.
As for builds. These are really situational but youl get the point:
Anti AD Tank:

Anti AP Tank:

Hybrid Tank : This one is based on the enemy comp, im just gonna put what i usually use.
(your choice of boots here)
P.S. I usually dont build support because of trust issues, but when i do:

And this is why i dont understand why people want to change him so much.
Champ Comparison: VS Thresh Lower Cooldown than thresh with a garanteed catch on target enemy. With built in armour he can take more hits than thresh, making him tankier. His built in Heal lets him keep tha ADC in the lane longer. VS Blitzcrank Getting pulled by blitz gives him the advantage of getting closer to enemy ADC for a stun. His heal outsustains Blitz passive. Also Same point as before, ADC in lane longer VS Soraka Cannot outheal her heal ADC based. Can stun soraka to keep her from helping adc Can outheal her solo based (if she cant land her Q, she cant heal) So he forces her to B more often, making her waste XP and Gold. Vs Sona (They are even in my opinion, althought she has the poke/range advantage) VS Braum Braum cannot protect against the stun with shield ( Targeted shot not skillshot) Braum cannot outsustain him. They are even in the defencive aspect tho, and their utility is even as well. VS Bard I Admit, Bard has the Advantage over Taric Less heals than Bard, although Tarics are stronger Less mobility than bard Bard outpokes Taric VS Karma Karma flat out beats taric, as she does against most other supports. VS Lux Sustain over shield(Health is better, because it doesnt go away over time ) Loses in poke. VS Tahm Kench (never fought Tahm with taric, so im gonna base this on playstyle. But i own both, and i believe that tahm is better) VS Nautilus Naut has more CC than Taric. but its useless if he never gets to combo it. Taric neutralizes Naut with his stun, just enought that the adc can get away even. if naut initiates with Hook he wastes the chance to catch again. Naut is tankier.
E (both old and new) has an AP ratio of .6, and that's his "do a little damage and regen my shield" button.
has almost the same AP scaling on her Q as Taric's entire kit (including his heal).
, and she has a horrible laning phase on purpose. Large mana costs, huge CDs, and short range makes Taric very vulnerable to poke, and his heal will only sustain him as long as his mana holds out (which won't be very long, considering his mana pool).
was a priority for a rework, which Riot then promptly screwed up), and his animations and model look like something from a completely different game. A much older, less polished game. Tarics got problems that a simple number shift can't solve. He needs a lot of help to be relevant and viable.