Its a tricky build to get right and you have to know where it works and just as importantly where it fails.
Assuming you are experienced as a necro and as a monk and know the skills you should pick it up pretty quickly.
For a list of such builds go here
http://www.pvxwiki.com/wiki/Main_Page
Its a link to all the guildwiki builds you will find the one you want under farming.
As Payne said you get to 55 health by using the -50 health item from ascalon in prophesies and then using a low al armour set fill all the locations with Sup runes.
One will have to be a duplicate as there are only 4 different fill in with the cheapest.
Its all explained on the site and there are a number of alternatives to N/M