my hammerdin has only like 38% block with holy shield, but around 4.6k life.

I was wondering if I should remake and put into dex until I had max block then rest vita?

Yes hammerdins do need max block

In the future post any Diablo II related question here http://forums.d2jsp.org/forum.php?f=21

ofc it does need mb

as a caster that can reach near immunity vs melee with ease, id definitely suggest going with max block both pvm and pvp

constant 500dmg

40% block => 200 constant dmg
75% block => 125 constant dmg

35% block = 70extra dex needed = 70 less vita = 200-400 life lost

20 attacks on 40% block=>4000
20 attacks on 75% block=>2500

you have 4.6k life with 40% block, and get -4000 life after 20 attacks leaving 600 life
you have 4.2k life with 75% block, and get -2500 life after 20 attacks leaving 1700 life

it leaves you with higher chance of survival and hammerdins are almost the same as melee as they have to teleport onto monsters/enemy so they will get hit anyway.
characters who do not need max block are limited; bowazons, no-shield barbs, summoners (not all), sometimes druids.

Life is much easier with Max Block.

Thanks guys I was just unsure, question answered!

It totally depends on your purpose. You can get max block with a gear setup and little or no added dex. Every hammerdin I've ever made was full vita with a block setup. Depends on how rich you are and how good you are.