Oh man I love dragonbroness, we're tighter than sunbros! This is said with an extra PvP idea in mind.
Here we go:
Whips- He was saying that whips, and the Greatswords of Artorias are the 4 weapons that are considered terrible (and intended to be used), and suggesting that you avoid them all. Against that, I will say, if you really like the weapon and really want it to work, then the Cursed version I consider barely passable in effectiveness. I will suggest that you make sure you like it, but if you do, then I say go for it, I don't think the whips are terribad either, but the normal wolf sword is so bad for its stats, I consider it to be the worst weapon in the game overall, and I hate it so bad I spread my hatred like cream cheese all over a bagel a tasty bagel. Oh turds I just got home and I'm hungry, cook damn food!
Where was I? I love Great Heal, I was trolololing my friends, basically saying all the stats about it, "I love Great Heal, it heals almost as much as a humanity" with poise, if it goes off, you'll be easily healed 100%, but at your comparably low VIT, you may benefit more from just normal Heal.
Great Magic Barrier is a good spell, and very powerful, but it does lose its effectiveness when you don't have any armor. I'm not suggesting for or against it, but I'm just letting you in the know. I understand, it seems to be one of your greater desires of your build.
I like the Wolf Ring, but it has a flaw, if you're using it on a weapon that requires more than 40 poise to protect you from, it won't do a thing, I suggest you have the Cloranthy Ring ready for a back up on heavy weapons. Because I dislike quick swapping, I avoid it for that reason.
Let me tell you about the claws and Cestus. The Cestus is terrible (you'd want to use the 'Claws' at those stats anyway, but not Dragon Claws). Its moveset is a button smash, its damage is low, but what really kills it, short range and low defense with low poise. You can't trade hits with it, you can't stun with it, and in all honesty, you'll probably not hit them with it (I know I couldn't). The Dragon Claws are worst in moveset, but have special abilities too. They just smack smack smack smack, but have a good AR for a pure physical weapon, 400. They can parry, weigh nothing, have no requirements, no scaling, do extra critical damage, and get extra buff from Dragon Roar. I would suggest you use the Dragon Claw between the two, the Dark Hand is probably better than all three, but I'm more a shield guy, because I like my insides to be, well on the inside.
If you have parts of you build you really love, like Soulmass, don't just drop it unless you don't really like it. If you decide that Soulmass isn't for you, then lose it, but this build, it isn't too far to get that 24. One important thing: You need 31 INT to get all 5 balls, with only 24, you'll get only 4, not bad, not full power either.
Yes Dragon Roar can deflect spells, the only thing I don't think it can deflect is special dragon weapon moves. I've defected WotG with it, Force, Great Combustion, Crystal Soulmass and Soul Spear, Fireball. I'm pretty sure its good for all spells. It also can deflect Dung Pies, Throwing Knifes and Arrows. Pretty cool huh? I love dragon-ness.
I know you don't want to use a shield, but trust me, in the current build, you have an empty slot, which could be sorcery, or you could switch the talisman to the other side (as it currently has no benefit on either side), and use a Tower Shield. Just trust me, if nothing else goes there, put a good different type weapon or a good different type shield. The 2nd best thing about Dragon is you can wield almost anything and still fast roll, you should enjoy something heavy.
If I'm being extra helpful, be sure to thank me dragonbro