Well, there are a few things I would like to note. Due to my experience in the forest for hosting with tank builds, I shall start with that one.
First off, never fat roll. It is a death sentence. Mid-roll is able to dodge most attacks and even roll-bs sometimes. Fat roll leaves you very open to attacks, and it is hard to get the most out of all the extra weight you will have. The extra poise you get from Havels isn't worth it, unless you are one of this maniacs that put wolf ring on as well to be able to tank two hits from an Ultra Greatsword two-handed.
Secondly, Dragon Tooth has no practical purpose other then aesthetics. It is heavier and does less damage then the other hammers, with it's only upside being that it never breaks. So switch to a Great Club or Large Club.
Thirdly, never wear tiny-beings ring. It sucks.
Fourthly(is fourthly even a word?), Havels shield isn't necessary. Is it effective? Yes. Worth ten whole points into strength? No. Stone Greatshield can get very similar results to Havels. Unless you want to use it and the Dragon Tooth for a full Havel cosplay, you shouldn't bother with the weapons.
Now here is the build I propose http://mmdks.com/3r4e Massive health, massive defense, better weapon, mid-rolls, and switch the spells a bit. Magic Barrier is a good choice, even though Stone Greatshield sucks up pursuers like they are nothing. But heal won't help you much. You won't be able to run away and use it in time for it to actually be worth it. By the time it heals you, they will have either backstabbed you or hit you for more damage then you healed, since you are at a low faith. Instead I put on force, which is good if people decide to try to get behind you a lot or you are being surrounded. It will give you at least a bit of breathing room. Also, if you switch the Great Club to Large club, and add one point to endurance, you can wield a mace also. Good for a back-up weapon.
Now for the dex one. Not much to say about it. Dex builds are piss-easy to make, and katanas hardly even need much poise to survive. Like the armor set-up as well. Just change the shield to Balder shield since you have the extra weight, or change the gloves to ones with more defense, then switch the Hollow shield for the Caduceus Kite shield. Better stability.