Wooh~ If we include MvP cards/equipment, then it's a whole different story. Servers where the lvl limit is over 99 usually don't invest much on VIT because Acid Demonstration can trash you.
With fast attacks, TKs can be very reliable on stuns, that's why I suggested Mythical Lion Mask, but it is ultimately your choice.
I wouldn't suggest to have the Horong Ring equipped all the time, since it is only situational, and if you were referring to Errende Ebecee Card, it relies too much on chances.
For Garment, the cheap one to go for is Raydric. If you want reduction + Flee, go for a +9/+10 Garment with Orc Baby. Deviling is nice against those who inflict physical (Neutral) dmg, but not so against other elements.
If you can choose any shoes, then go for Variant Shoes.
Orc hero is a good choice if your VIT doesn't get to a 100 (for immunity), then again, I doubt that you will reach to 100 VIT. You have another card to spare for Headgear since Ulle's got a slot as well. I wouldn't go for Marduk card since you can just carry green potions to counter silence. Dunno how easy it is to refine in your server, but if it is relatively easy, you can get an extra +4 STR with Seyren Windsor. Another option is to go for Grand Peco and get some extra VIT along with DEF.
I'm out of ideas...
At least in my server, the Sunglasses[1] quest is next to the armor/weapon shop of Prontera. No links, sorry.