Do i need sublime?: Yes it's a major part of your defense if you want to do titanic farm, if you're not doing titanic t17, then no it's not needed.
The mirror sword is also required for this build, no other mirror items are needed (can use a greatwofl with % attributes/phys reduction).
Can also use a regular helical ring that isn't refleted (if you do this, then go for a 4 mod with crafted all attributes over min endurance).
You also really want lvl 100 on this build, as stackers get a lot of value from lvls.
At minimum you want 2 small clusters, as they give a bunch of ES.
Proj speed tattoos are only for lightning strike, they actually decrease your dps with molten strike, so feel free to take them out. The pierce nodes on the tree are also only for LS.
If you want max DPS for titanic boss, then swap in molten strike of zenith/awaken greater multiple projectiles over lightning strike/item rarity support.
Crown of eyes needs +2 lvl of fire gems for your purity for fire.
you want attack crit corruption on shapers touched, this is how you reach crit cap.
------Crafting guide-------
Helical ring:
1) Fracture t1 str, int or rarity. Can always resell failed fractured
2) Spam str or int essence until you have t1 int/t1 str/t1 rarity(suffix)
3) If you're going to reflect then make sure the last 2 mods aren't bad if they go negative (crafting min endurance and having something like life on prefix).
4) depending on prices you either lock/reflect or just spam reflecting mist until you get it(have to mass craft rings), but like i said a reflected ring isn't needed. (if you don't reflect, then craft all attributes.)
Body Armour: use twilight regalia with the highest quality you can afford
1) Fracture any %es or flat es (% es, flat es or hybrid %es) - Ideally try to get two t1's and then go for the fracture (spam harvest reforge defense)
2) Spam spite essence until you hit double t1 prefix (% es/flat es/% es hybrid). Use eldritch exalts/annuls when you one of the two t1's.
3) use bestiary to add on lvl 30 aspect of the crab (make sure to do the lvl 30 one, requires black morrigan).
4) craft % attributes and your done.
Boots: Use warlock boots with the highest quality you can afford and fracture an abyss socket.
1) Spam str essence until you hit t1 int, suffixes are done.
2) Eldritch crafting time. Block mana and exalt, remove crafted mod and annul. Repeat until t1 es flat or t1 es %.
3) Now just exalt again and hope you hit, decently expensive to craft prefixes, can settle for t2.
Always have mana crafted on so it's blocked, when you exalt slam.
Small clusters:
2 methods depending on prices.
1)Can fracture flat es and then spam 1 socket resonators with fundamental fossils until you hit str/int/inc effect (exalt/annul if you have 3/4 desired mods)
Or you can fracture flat int and spam reforge defense on harvest bench until you hit str/int/inc effect (exalt/annul if you have 3/4 desired mods)
2) You then need to corrupt and use tainted divine teardrops, this is very expensive and can easily cost 300-400 divines.
Ideally before corruption you want the highest tiers possible, as this will make the teardrop process a lot cheaper (although still very expensive)
Large clusters:
Just spam reforge speed on harvest bench, exalt/annul when you hit 2/3 of the mods. If you're trying to go for a 4 prop, then fracture martial mastery or +8 int
12 passive large: 2 methods here - Always fracture 35% effect
Spam 1 socket resonators with fundamental until you hit 3 out of the 4 mods, then exalt/annul for the 4th mod.
or
spam reforge defense until you hit 3 out of the 4 mods, then exalt/annul for the 4th mod.