What is a good natural dex to build up to..

Darkwarrior, dual wielder for slashing. Gonna max melee and defense and 'store' the rest in recovery. What is a good natural leveled up dex to go to up before leaving any extra dex to be 'equipment based' ?

[Hunters Bane]

I suggest your overall dex should be around 170-200

I used Slashing weapons up to ~lvl 40, when I switched over to Crushing.
To reinforce Cappie's statement above, I found that a 1- to 1.5-dex / level ratio was pretty decent.

One more tip while we're on the topic: Dex is a much more expensive ingredient for enchanting stones than Str. If you plan to use enchanting stones, it's generally better to assign a few more points to Dex first, and then use the stones to boost your Str.