Somewhat reposting what I posted on BG a week ago:
Ironside - Iron Giant:
Insanely weak to Thunder nukes. Very easy fight.
Sarsaok - Elasmoth:
Super weak to earth, ice, dark (use impact!) and many more elements. Very easy fight for nukers.
Strophadia - Harpeia:
Annoying with aoe that sets all stats to 1 for a while. However steady nuke damage was able to kill it no problem at all. Used Ice.
Gajasimha - Khimaira:
This one does not take magic damage super well. However it still is a good way to kill it compared to melees getting their TP reset all the time. It will level up when it buffs itself, so try to keep it silenced. Just use Ice and whittle it down for a win. Will do 25+ Fulmination at lower HP interrupting your Immanence skillchains. Can use Vex/Attunement/Barspells to mostly resist the status effects however.
Bashma - Hydra:
Takes magic damage pretty well. However very annoying when it spams magic shield for 5 minutes in a row. You can force physical shield by breaking one of its heads. We almost timed out on it as 18 man. However if you go for a lowman clear a SCH can use Tabula. Make sure NOONE feeds TP after pop and stick Kaustra and Noctohelix on before it uses a Magic Shield. This will devour its HP greatly and secure a win usually.
Old Shuck - Orthrus:
Literally the worst of the worst NM unless there is some trick to it. It will howl and then level up after. This made it almost impossible to hit after a while. It's very evasive and its melee hits have En-Flash, too. When it howls it resets hate also. After our 18 man attempts only got it to 90% each time using SAM and Mages we cut down to 6 man in order to get clears for T3 pops.
3x GEO (1Idris) SAM PLD WHM with 2x BRD prebuffs and all 2hrs used only got it to 50% in two attempts. However our SAM now upgraded his ACC gear by 100+ by today and it might be better.
Then we went back for a mage setup:
2x GEO (1Idris) BLM SCH PLD WHM with 1x BRD prebuffs and all 2hrs used was finally able to beat it. We all stood around it - PLD atthe back and nukers at the front. Brute forcing it down. Used thunder nukes to do damage. My SCH Thunder Vs were doing 3000MBd at first. After a few howls damage suddenly went up to 6000 somehow. Our PLD got taken out by a tailwipe for 2800 at some point. Actually managed to kill it inch by inch. Outside of MBs nukes were very little damage. This was before we unlocked rebuyable revitalizers for Escha, so should die better nowadays.
Silly BSTs zerk has no real trouble on the Cerberus apparently.
Hated every minute of doing T2s at the cost of having to do Incursion. To sum it up. 4 NMs should be no problem for nukers, the other 2 can be done but need an elite crew for Cerb (especially the WHM) and a lil luck for Hydra.