Durability Katana Build Help

Premise of the build I have in mind and need help forging: Durability DPS, Dex over Vit, with the skill trees Mononofu, Dual Swords, Survival (mainly for early on and leveling between levels 110-160, but the Play Dead and HP Boost looks nice for late game), Battle (WHACK and Crit Up), and Decoy Shot.

Stat Spread
STR: 1+
INT: 1
VIT: 90-160
AGI: 1
DEX: 255+
Personal: 0

Planned DPS Skills: Garyou Tensei/Divine Slash 10, Shadowless Slash 10, Tenryu 7, among others to build up Garyou/Divine Slash
Passives: Shukuchi 10, Dauntless 10, Two-Handed 10, Boshido 10, Quick Draw 5 (useless but having it around lets me recover a bit of MP and having the ability to get Decoy Shot), Long Shot 5 (horrendous), the Dual Control skills 5 (useless but Godspeed is great), Godspeed 10, Sword Mastery 5 (useless but allows me to get War Cry), Quick Slash 5 (also horrible), Attack Up 5, Whack 10, Critical Up 10, HP Boost 10, Play Dead 5
Buffs: Quick Aura 5, War Cry of Struggle 10, War Cry 7, Kairiki Ranshin 10, Berserk (maybe), Meikyo Shishui (crit baby),

If there's anything I need to know or need to add or get rid of, please do tell me. I am newer to the Katana section of the weapon tree and have been a Greatsword main since I started playing the game, so I am only really good with the Buffs side of things

 

I haven't tried tanky katana myself but from what I can see there will be few concerns:
1. Investing VIT over STR/AGI will lower dps output a lot because less Critical Damage.
2. Consider learning Bouncing blade 10. It will increase garyou stack and heal 100% damage received (if you got attacked during animation).
3. Berserk reduce 90% of your def mdef if you use katana.
4. Kairiki's ignite hurt quite a bit on VIT build so you might need pre-recovery or use others alternative (healing item, bloodsucker combo, etc).

Thats all from my theorycrafting.

 

@A Wandering Guy you should also mention which katana you're planning to use

As @Arv says, choosing VIT as your sub stat lowers your damage, from a regular DEX<>STR bbuil. You have to supplement it more with atk dex srd unsheathe on your gears, including xtals, just to balance the build.

Some katana users, who somewhat tried a tanky build, settled with DEX<>STR stat, but use a katana with a default stat of HP+1500 to 10000.

^_^