Add support for several different spectres: Arena Master, Ruins Hellion (partial), Trial Windchaser, Aurid Synthete, Ancient Wraith, They of Tul, Ancient Suffering, Merveil's Retainer, Primal Crushclaw, and Primal Rhex Matriarch

[Lothrik]

PoB: https://pastebin.com/5BWwNYxT

Trial Windchaser: Fixes #2598.
Arena Master: Fixes #1775.
Ruins Hellion: Fixes #2315. Fixes #743.
Ancient Wraith and Aurid Synthete: Fixes #2894.
Primal Rhex Matriarch: Fixes #3965.

Arena Master is used for its unique Arena Master's Presence skill that grants "20% increased Damage, Attack, Cast and Movement Speed" for 4 seconds with a.. 12 second cooldown apparently? I'm pretty sure this used to give 40% and had an 8 second cooldown — pretty severe nerf. I'm not convinced implementing this buff is worth the effort.

Ruins Hellion is apparently used for the "Enemies Taunted by you deal 30% less Damage with Hits and Ailments against other targets" component of its Rallying Cry skill, but PoB doesn't even implement effects like that for the player, never mind a minion that has ~8K HP and is apparently used for a taunt..?

Trial Windchaser and Aurid Synthete seem fully functional. Aurid Synthete has a lot of weird triggered spells.

Ancient Wraith has +1 curse and Enfeeble on Hit.. which seems extremely valuable but I'm not sure how to implement it.

Preview:

New config option ("enable buffs" -- note that both of these options default to Enabled):

Brief documentation:

[Lothrik]

I just noticed the DelveMonsterEnfeebleOnHit and AdditionalCurseOnEnemies_ entries in Ancient Wraith's modList. I'll see if I can get that mechanic working.

[Lothrik]

Ancient Wraith's +1 curse and Enfeeble on Hit thing works now. I had to add support for like.. everything.. to get this working.

[Lothrik]

Added Ancient Suffering (Temporal Chains on Hit) spectres.

The two curse on hit spectres and Arena Master are basically 100% functional now.

They need to be set as the active spectre somewhere (not just in your spectre library) for their unique effects to show up properly under calcs.

Edit: Added They of Tul spectres, with full support for Snow Cloak.

Edit 2: Added support for SeawitchVulnerability cast by Merveil's Retainer spectres.

[Lothrik]

As the curses used by Ancient Suffering and Ancient Wraith can't be datamined and are relevant for #3930, I asked viperesque what the proper internal names are for their curse skills and replaced my placeholder internal names:

Ancient Wraith Enfeeble on hit is from the DelveMonsterEnfeebleOnHit mod

Ancient Suffering Temporal Chains on hit is from the MonsterChanceToTemporalChainsOnHit1 mod

[Lothrik]

Added Frigid Roar to Primal Crushclaw spectres and added Primal Rhex Matriarch spectres (plus their Thunderous Roar debuff). Both debuff values were confirmed by viperesque.

[Wires77]

LGTM!