Need fire sorc advise

Hi. I made a sorc yesterday and got her rushed to hell and have been chaosing till she finally hit 83. I then leveled up her a2 merc to 83 and was super happy to finally be able to give infinity to my merc so that I could break fire immunity but to my surprise.... it doesn't break T_T.

I was in chaos and all the pit lords were still fire immune.

Here's her gear:

Eschutas socketed with 5/5 fire facet

Shako also socketed with 5/5 fire facet

DS Coh

Phoenix shield

Maras

Magefist

Arach

2xsoj

Travs

Merc's gear:

Infinity

Fort

Andy

I really thought with the infinity and phoenix, the fire immunity would break... My light sorc has no problem with light immunes...

Is there anything else I could give her to reduce enemy fire resistance? Well except for phoenix sword coz that would make her dmg go way down...

She's a firewall/thunderstorm hybrid btw.

Please heeeellpppp hehe

Thanx.

EDIT: Wow I just found this table with a list of all immune monsters and pit lords' fire immunity is simply almost impossible to break... So that explains it. But I would still like to know if there are other gear items that lower enemy fire resis.|||Lightning is by far the easiest immunity to break b/c typical "lightning immunes" have lower light resist and once they have a resist over 100, anything that lowers resists only functions at 1/5 (20%) efficiency. Fire resists are more common and usually higher, which is why a pure fire sorc is usually a bad idea for solo play - you need a backup skill from another elemental tree.

You could try a wand with Lower Resist charges on switch, but I doubt it will break anything that your current setup doesn't break.|||no chance to break. for pvm you will still need orb to kill most fire imunes or wait your merc do the work.|||-fire resist gear doesn't break immunities (it will reduce their res AFTER the immunity is broken, but not before). Only conviction aura and lower res can break immunities. you can get lower resists on wand charges but its a waste of time.

Just ignore any mob that's fire immune if infinity doesn't break it. Its not like you have to kill every single mob. If you want to do chaos runs don't spec fire.

You can really do almost anything other than baal runs and chaos runs on a pure fireball sorc. But as mentioned above you could also put 10-15 points in frozen orb and 1 pt in cold mastery to kill fire immunes with. That would be a better investment than t-storm IMO. Frozen orb is nice because its good even with minimal skill investment.|||Not all fire immunes can't be broken.

Thunderstorm will do next-to-nothing, you'll need maxed orb to take care of unbroken immunes but at least with infi you'll only need one point in CM to take their cold resists down to -100. There aren't any other items with -fire res, in any case those won't break immunities as only lower resist (the curse) and conviction can. I don't know how viable this is because of the lack of -resists on your gear (Even broken fire immunes will not take much damage). An option is to go full tal's socketed with 3 facets and use pheonix for a total of -58 res.

Eschuta's is meh since the %damage just stacks with light/fire mastery, rather use occy or hoto.|||everything i know about fire sorks......