only a curse or aura can break an immune, then -res equip comes into play. the level 6 conviction is -55 resist, same as what you get on a fathom. The only thing is, if you break an immune with that conviction it only works at 1/5 the strength so it becomes -11 res. If you were using fathom with -55 and had the immune broken by a merc/ nec with lr then the whole -55 on weapon is working for you. The holy auras runewords will break immunes (put them on a merc) up till act 4 hell. Once you get to act 4 hell you will need infinity on the merc to break the basic trash immunes. That will break them up till wsk in hell. After that even a maxed conviction wont break immunes alone so you will need help there.
Some immunes may not be broken by holy auras and conviction on infinity. It depends on the enemy. Uniques will be alot harder to break.
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