This is a DoT on a target that can be moved via new SWP casts. Need to find out tickrate and if it is hasted.

Wrathful Faerie
Call forth three faerie guardians to attend your targets for 20 sec.
Wrathful Faerie: Direct attacks against the target restore 0.5% Mana or 3 Insanity. Follows your Shadow Word: Pain.
https://shadowlands.wowhead.com/spell=342132/wrathful-faerie

Fae Fermata
Your Fae Guardians leave behind a 60% effective copy of their benefit, lasting 3.8 sec when they jump to a new target.
https://shadowlands.wowhead.com/spell=338305/fae-fermata

• Wrathful Faerie Implemented
• Fae Fermata Implemented
• Options
• Bar Text
• Documentation

0.75 ICD, 100% proc on any attack to the target from any player after, could be anywhere from 0.75 -> 20sec between procs. In raids, probably close to 0.75-0.8sec
Debuff Id = 342132
Energize Tick Id = 327703

Fermata, max 1 (when SWP is applied to a new target), 60% value (1.8 Insanity). Proc is the same
Debuff Id = 345452
Energize Tick Id = 345456

This may be helpful: https://wow.gamepedia.com/API_C_Soulbinds.GetTree

Closing but holding off on updating documentation for now.