SCH gear for the non-career mageFollow

Not a huge deal of stuff will upgrade you from AH. Unless you spend alot.IE; 500k +.
The upgrades you need now are rare/ex.
Yigit and goliard. Some relic and af + 1.
But as its not important as u state u pretty much got it covered.
But sell the druids and nuke in mahatma.
Also HQ staves is the biggest bonus if you are gonna spend a bit.

Forgive me if I come off a little rude, as this is a subject that's been rehashed ever since the job was released. What kind of nuking situations are you looking to fill? What kind of money are you willing to spend? How much time are you willing to put forth to achieve the pieces that cost no money but require time?

As you stand right now, you have an even 100 INT. For anything HNM, you're well under where you could be as far as getting the most out of your INT *in a resist only mindset*.

Pieces such as Errant/mahatma body offer 10/11 macc as well as the damage boost to your spells vs AF body which offers 16 macc and only 1 INT worth of bonus to damage. Errant/mahatma legs will offer 7/8 macc and a substantial boost to damage vs your druid slops 5 macc. Snow rings. 2 of them. Yigit hands are great, but I personally prefer goliard for their "all-around yummy-ness". 4 mab and 4 macc is quite the potent combo. Goliard feet will offer an extra INT, yigit feet will offer a bit of MAB. Either will be nice, but goliard's extra INT offers a bit more macc. Elemental torque offers 7 macc, but Prudence torque offers 5 macc and a substantial boost to damage. Even enlightened chain will offer 3 INT, though you sacrifice a good chunk of macc.

There are a lot of things to consider. I recommend finding the macc levels that you're comfortable in, figuring out how much INT you have and how much you can gain while trading elemental skill gear to achieve the same resist rates. SCH gearing isn't as "straight-forward" as BLM gearing. There are multiple paths you can take to achieve similar results. I personally have a mega-INT build that suffices all of my resist needs. Doing this, I hit the acceptable resist rates while keeping my damage in a very respectable number. This is my own little niche that I found. My build isn't the right answer for everyone. This is my personal favorite thing about SCH. As long as you're thinking properly about gear, you will find that there are so many ways to achieve the same results.

That statement is very wrong.

While INT is less than the mob's INT value plus 10: INT increase is equal to macc increase is equal to elemental skill increase of the same numerical values.

While INT is greater than or equal to the mob's INT value plus 10: INT increase is equal to 1/2 of the equivalent elemental skill and macc increases.

He only has 100 INT. For everything that isn't EXP or limbus, he will be below the mob's INT levels, thereby having a headroom of at least 10 INT to increase before the macc from further INT drops by half. For EXP and limbus, if you use any resist gear whatsoever, you're foolish.

If he wants to nuke kirin, he has until 159 INT before further increases are halved on their macc.

MAB has no relation to INT whatsoever. MAB is a direct multiplier in the magic formula. INT directly increases base damage to the spells. In theory, you need a balance of MAB and INT to achieve proper damage. Ebullience, however, alleviates a lot of the 'need' for magic attack bonus. With exceptions of the larger bonuses you can achieve, on SCH, I've found that that INT can usually be the more beneficial choice.

120 INT, like has been said in other threads, is generally used because of the fact that most HNMs, with a couple exceptions, have ~109 INT. This puts 120 INT as being above the 1:1 cap. Still yet, that gives him 20 INT to improve upon. This is why I suggest that he try to find the proper balance between macc and INT sacrifices so that he can make the most out of his INT without hurting his resist rates.

Another thing to think about is this: If you're under klimaform, you can nuke with nothing but an HQ staff and probably hit acceptable resist rates. The majority of a SCH's nuking should be done as such. Due to the nature of this, my INT build is further supported.

Once again, however. There are so many "right" ways to gear a SCH to achieve the same results that you should just experiment until you find your own niche. No reason at all that 2 SCHs putting out the same numbers should look identical.