Boon application for Heal Alacrity Scourge is very straightforward and you are very likely to end up massively overcapping on key boons such as Alacrity and Protection which allows you to be flexible with your Sand Cascade and Sandstorm Shroud usage to protect your team!
Heal Scourge excels at preventing damage with Barrier learning encounters and predicting damage will greatly increase your effectiveness. Use Sand Cascade and Manifest Sand Shade when you know damage is incoming to absorb it. Barrier will also remove a condition from affected targets, which combined with the very short cooldown of Nefarious Favor will be more than capable of handling even extreme condition pressure on your team!
Have at least one Manifest Sand Shade active at all times, or you won’t fully apply Alacrity and Protection to your entire subgroup because each shade (including yourself) affects 3 targets. Having a shade up also grants you 15% damage reduction and 15% extra boon duration from Blood as Sand and Sand Sage respectively. You can’t maintain 3 shades permanently however you can spike up to three for short periods of time, this means that you can occasionally apply massive barrier to your entire squad – manage your shade count carefully
Your key sources of healing are Well of Blood and Transfusion. These need to be used carefully as they are also your highly potent revive power abilities. Use them to heal allies when you are not expecting anyone to go downstate in the immediate future. Be especially careful with Transfusion as the ability to pull downstate allies to you is extremely good at recovering bad situations. Life from Death will also be consistently healing allies during your rotation, it heals on a delay after Sandstorm Shroud finishes which can make it difficult to actively use but will provide solid passive sustain regardless.
Transfusion is incredible for reviving allies, when activating Garish Pillar you will pull all nearby downstate players to you and start slowly reviving them, when combined with Garish Pillar andWell of Blood this allows you to almost immediately revive entire squads! Be careful though – don’t pull players into worse situations than they were already in – encounter knowledge and understanding when to use this ability is key with Heal Scourge!
You have completely infinite life force thanks to Eternal Life, you can use all of your shade skills with complete freedom and never be afraid of running out of fuel. If you somehow manage to run dry both of your weapon set autoattacks are very strong life force generators!
This build can very effectively sustain allies at range by placing a shade on them and then using Sand Cascade, those two skills combined should very easily keep them alive!