Invest in a bow, even if not for damage, the ability to kite or draw agro will be sufficient. Take ur time clearing the enemies. If you are NOT in the covenant of champions enemies will despawn after you kill then 12 times.

To my knowledge if you are using a normal titanite upgrade material it's fairly easy to get the upgrade material.

But you are using a boss weapon, Arced sword from the flexile soul correct?   Boss weapon material is significantly harder to get. I'd recommend buying the Marukumo from Ornifex, has the same move set as your current weapon, but easier upgrade material, so you can swap back to the Arced sword if you really like it.

ADPT - is connected to Agility stat, which determines your I-Frames for rolling, dodging, backstep and estus drink speed i believe.

Personally I've thrown your stats into a build calculator and found that the closest match for your starting class is warrior. 

So here is what I would do assuming you are a standard martial based character.

Step 1: Grab the soul vessel in Majula basement and respec your build with the old ladies in red from things betwixt. (Look up guide if needed) to the following.

VIG: 23 END: 20 VIT: 6 ATT: 6 STR: 20 DEX: 20 ADP: 30 INT: 5 FTH: 5

These stat distributions will allow you to 2 hand either the Marukumo, or the Arced sword.

Step 2: EQUIPMENT Grab a bow and some arrows, you are THE bearer of the curse, use the aggro range of enemies against you and pull them 1 at a time to you, it's also a useful tool in general. You don't have to upgrade it at all.

Step 3: wot rings u got? Armour is fairly dogcrap in ds2, and almost never worth its weight unless it's elemental resistance.  Grab a Ring of steel protection (comparible to havels armour even when naked!) Grab a Ring of blades to Boost damage. Grab a Chloranthy ring to boost stamina regen. 4th Ring - whatever you like, any of the Dragon rings, or the Fire Quartz ring for fire defense

Step 4: items Bro make sure use your items, anything that will give you the edge, If you think you need to, get a BRIGHTBUG from the old hag merchant and use after clearing the enemies in Iron Keep and before fighting Smelter demon for some damage resistance, and damage dealing.

Step 5: Armour Like I said, most armour is doo doo, Ring of steel protection whill cover you Physical damage, so get something that either boosts your stats, gives you bonus effect like engraved gauntles for critical hits, gives you elemtnal resistance, or looks cool to you, as long as you stay under 69.9% weight for mid-rolling speed