It depends.
the Extra health will help against armour ignoring damage like degen. + 5 armour would help against warriors and elemental attacks.
As a MM I would suggest maybe a +1 Death 20% mod to give some of your minions a extra kick when raising them.
BTW While collectors staves are nice the only downside is you can't really sell them OR salvage the mods off them after they have been added. Though that is the same for greens as well (though you can usually sell them back later on)
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