Astro Card system is useless!

[Amecoeur]

The way I use it currently is use Spire (400p shield) prepull, in dungeon when pulling).
Opener is quite the same with EW.

[XX]Earthly Star
[-1.5]Malefic
[0]Combustion
[GCD1]Malefic > Lightspeed
[GCD2]Malefic > Divination
[GCD3]Malefic > Play Balance, Play Lords
[GCD4]Malefic > Umbral Draw, Play Spear

You can keep the rest of the cards until Astral Draw. Use them as you need, just don't forget to spend them.
Cast Astral Draw on cooldown and use the Spire as you need, be sure to spend it before your Divination burst phase.

The only thing I dont use often is Arrow tbh, the healing increase doesn't boost abilities heal if I'm not mistaken and we want to use spell heal as much as possible so unless its a heavy spell heal situation I just let it expire.

[rewd]

The way I use it currently is use Spire (400p shield) prepull, in dungeon when pulling).
Opener is quite the same with EW.

[XX]Earthly Star
[-1.5]Malefic
[0]Combustion
[GCD1]Malefic > Lightspeed
[GCD2]Malefic > Divination
[GCD3]Malefic > Play Balance, Play Lords
[GCD4]Malefic > Umbral Draw, Play Spear

You can keep the rest of the cards until Astral Draw. Use them as you need, just don't forget to spend them.
Cast Astral Draw on cooldown and use the Spire as you need, be sure to spend it before your Divination burst phase.

The only thing I dont use often is Arrow tbh, the healing increase doesn't boost abilities heal if I'm not mistaken and we want to use spell heal as much as possible so unless its a heavy spell heal situation I just let it expire.

Arrow works on oGCDs too, whenever a tooltip says "healing actions" it includes abilities. If it says "healing magic potency" then it's only for spells.