Here is alittle information about how mind blast wrecks any pure dexxer. I run at 90str 90dex 45int with wearing ringmail it brings that dex to about 82-83. If you wish to play a pure dexxer you should know that at 90 dex it will give an extra tick on your weapons. So you can wear ringmail, chanmail, or plate as long as you dont go under 81 dex. With a agilty pot that brings you to 101 dex and if you get hit with a clumsy that would be minus 11 which will bring you to 90 dex. With me? Now after some testing running a 90,90,45 and being potted Mind Blast will do about 32dmg unless resisted. While playing a mage or a hybrid temp Mind Blast isnt a real factor. You can roll any stats that you want pot an agility pot and Mind Blast will do little or no dmg depending how you have you stats balanced. Since there is no int pot dexxers will have to resort to -55-75 dex to lessen the dmg from mind blast. If you roll a macer or swordsman .5 on a tick at 90 dex is crucial up from 55. Its a shame how one spell can alter your dex. The best thing any pure dexxer can do is fish up some rare fish and get plus 5 int. Also im not sure why Mind Blast works with shown stats.
It might be worthwhile in your scenario to not use the STR+DEX pot. It kinda feels like you only want to play at the 100 dex range and there's just no way to do that without being susceptible to mindblast. Maybe you should feel out whether your opponent is going to cast MB before you pot up. Edit. You could run something like 80. 45 100 and be pretty well off. You could just use a str pot and be okay i think.