HoS Me

To ASK hand of salvation you must use this macro: /run WeakAuras.ScanEvents("ASK_HOS")

All credits for base WeakAuras goes to:
Buds#0500 @ Discord - https://wago.io/p/Buds and
Gordory#3993 @ Discord https://wago.io/p/Gordory

For paladins:

It works out of the box!
Icon and sound indication for asking HoS with class-colored name who asked it
Raid-frame indication (tested and works perfectly with blizzard frames, healbot and vuhdo)
If u can't give HoS cause you're very-very busy - just ignore it, and another paladin will take the next request (if DD still be alive)
You never get the request when your HoS is on cooldown or you too far away or even if you are dead
There is built-in simple load distribution for paladins. All pals in raid will take about the same amount of requests from raiders
If you are tank or some extremely important person you can ask raiders to blacklist you in aura user-configs
For raid-members:

You need to make request macros with /run WeakAuras.ScanEvents("ASK_HOS")
Indication of request. Icon with name who got this request
Sending request only to alive paladins in raid, without a HoS cooldown and in range
Sound indication of failed request - if paladins HoS is on CD (rare situation, for example if u reloaded your interface and your variables was cleaned). If you got that indication - you can press macros one more time and request will be sent to another available paladin.
Indication of recieved HoS. Sound and icon with remaining HoS time
If you don't want to ask some paladin to HoS you - just blacklist him in your aura user-config
If there are no available paladins OR you got Forbearance debuff there will be no request indication and you can press your Invulnerability potion. For example it can be made with shift modifier by this macros:
#showtooltip
/use [mod:shift, combat] item: 3387
/stopmacro [mod:shift]
/run WeakAuras.ScanEvents("ASK_HOS")
Feel free to use!