Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

I've been playing my con lock for a while now and I screwed up the build and would like some advice how to patch him up.
The biggest problem are the low con saves, he is currently 20 and has unbuffed 13 fort.

Starting stats

Race: Tiefling.

12 str
14 dex
16 con
8 wis
13 charisma.

Build 27 warlock 3 hellfire warlock.

Feats: Expertise/improve expertise/toughness/steadfast determination/Dark transient/luck of heroes and shield proficiency.

Mistakes I made in the build:

- I went 13 charisma over 16 dexterity forcing me to pick leap and bounds, I kind of wanted it for RP but with hind sight a bad move.

- I didn't pick veteran for the +1 con saves.

- Didn't went dragon slayer as it wouldn't fit his RP and it would make him bloom later.



Why the current build is a problem:

- I wanted to pick up the improved unarmed strike gloves which forces me to keep leap of bounds.
Unless the server has other +4 dex items, does any one know about that?
Since I could pick dark ones luck for +3 saves.

- No dragon slayer, thus -1 con there as well.

- Is it plausible to drop spear?

The character is fun and tough all around, but his reflex and cons saves are horrid.
Any suggestions how to fix him.
Is the unarmed strike worth it on a warlock ?

You use unarmed strikes on nothing as a warlock. You blast things with your eldritch dice.

Do you want to drop Eldritch Spear? Sure, go ahead, Eldritch Chain is the superior one.

GEt Spellcraft, gives saves against spells. Also, start hoarding those +1, +2, or +3 all saves.

So improved critical unarmed strike does nothing for blasting?
I thought it actually would work on blasts, this makes the solution a lot easier.
Just get dex gloves and take dark ones luck, with +3 fort items it would net me +6 saves.

You need improved critical ranged touch attack for warlock blasts.
If you increase your con with all your bonus attributes your fortitude should eventually be good enough, with some items.

Improved Critical allows you to more damage by rolling 19-20 to score a crit, instead of just rolling 20, so it will actually increase your damage by helping you to score critical hits more often. But I would not say it is necessary.