How do monks get down to 105hp?

I was kinda lookin at a 55 hp build, and i satrted looking at monk runes.
ok, an ele has 5 runes, so gettin down to 105 is easy. wheres the monks 5th minus 75 come from?
And yes i used the search button

Ok, thx a lot people

use the same rune it still give -75 hp

Rune penalties stack. Just use 2 of the same rune.

You just put 5 superiour runes in your armour. They give you the -75 health each but the effects dont stack so u get 105 health from that. You then equip a -50hp focus item that brings it down to 55.