My suggestions
The cards: Remove the annoying melee/range mess.
Arrow- 10% damage and 5% attack speed/recast
Bole- 10% damage and 10% damage mitigation
Spear- 10% damage and 5% critical hit
Spire- 10% damage and 5% direct hit
Ewer- 10% damage and mana regen
Balance- 10% damage and 5% increase to all main stats.
Lord: 10% damage and applies damage over time on enemy hit
Lady: 10% damage and applies regen for duration
Sleeve draw: Should not have a time duration.
Divination: Should not have a cool down. Once we have 3 seals it should be available to use.

Seals: We should have different combinations.
1 of each seal should stay the same. Gives damage buff.
3 celestial seals: attack speed buff
3 lunar seals: critical hit buff
3 solar seals: damage mitigation buff
2 solars and 1 lunar: direct hit buff
2 lunars and 1 solar: aoe regen
The combinations are endless. Square can totally milk this specific gameplay so well if they wanted too. Since we can’t aoe cards anymore. They should be more powerful on single targets.

Healing potencies are fine to me but nocturnal sect is so bad right now. Why don’t they just remove the sects and make neutral sect the standard. Just lower the potencies or the shield and regen and remove the 20% healing buff. Also the shields won’t stack when you have another ast but the regents will. Just my suggestions.