Mainly reworks to cards, not adding more damage buttons.
Benefic1 upgrades to Benefic2. This means that Benefic2 would proc the 'guaranteed crit on next Benefic2' trait, helping in those panic-spamming situations. MP cost of Benefic2 is reduced to 500mp.
Helios upgrades to Aspected Helios, MP cost set to 900 for both
Major Arcana: now autodraws one every 30s. If you have a Major Arcana drawn and the timer hits 0, you 'Spread' the second one, holding it in reserve. At this point, the timer will pause, like capping WHM Lilies.
Minor Arcana: now autodraws a Minor Arcana every 15s. If you have a Minor Arcana drawn and the timer hits 0, you 'Spread' the second one, holding it in reserve. At this point, the timer will pause, like capping WHM Lilies.
Sleeve Draw returns: A 2 charge, 60s charge time OGCD action. When you use it, your currently drawn Minor Arcana becomes a Lady of it's suit. More on Card Ranks in the Minor Arcana section.
Sleeve Draw's purpose is to be a 'bad luck prevention' system, which you can use to force the Minor Arcana you hold (preferably the ones in the burst window) to be the highest potency, so the burst window always feels satisfying to execute.
Draw, Play and Minor Arcana, are replaced with 'Play Major Arcana', 'Play Minor Arcana' and 'Sleeve Draw'. Playing Major Arcana is still OGCD, but Playing Minor Arcana are now GCD (to break up the Malefic spam). This means you can go Minor, Major, Minor Major (interspersed with Sleeve Draws as needed) in your burst window, should you be good enough to calculate ahead of the window who you need to target with each card at each step. If you need time to calculate your next move, however, you would be able to simply cast Malefic to buy yourself another 2.5s to consider the state of your cards
Your 2min burst window actions would be (GCDs in bold):
Malefic > Divination > Sleeve Draw >
Minor Arcana > Major Arcana > Sleeve Draw >
Minor Arcana > Major Arcana > Detonate Earthly Star >
Malefic spam til next Minor Arcana is ready
Now for Card effects:
Balance: 10% damage, 15s
Bole: 20% damage mitigation, 15s. Additionally, grants 3 stacks of Bole's Bulwark, causing the enemy that strikes the bearer of this buff to take 10% of that ally's Max HP as damage and consuming one stack.
Arrow: Grants 10 stacks of 'Arrow's Assault' (12 if the target is PhysRanged), increasing Autoattack rate by 400%. One stack is consumed for each Autoattack dealt under it's effect, and upon consuming all stacks, the Autoattack rate returns to normal.
Additionally, if the target of this card is the AST, grants 5 stacks of Arrow's Assault, speeding up the recast time of the AST to 1.5s for the next 5 GCD attacks, and making cast times of those spells instant.
Ewer: Grants 1000mp over 15s. Additionally, if the target is a Healer, grants 3 stacks of Ewer Overflowing, causing the next 3 attacks dealt by said healer to strike a second time for 100% of the spell's potency. Additional effects are not applied. This second strike cannot crit or DHit
Spear: 10% Physical damage, 15s. Additionally, if the target of this card is the AST, all magic damage dealt by the AST is instead considered physical for the duration, allowing them to benefit from this card's effect
Spire: 10% Magic damage, 15s
A Note on Minor Arcana: Knaves, Lords, Ladies are 7, 8 and 9 respectively. Due to not having a duration, these effects will last on the target until they are overwritten by another card, or KO removes them.
X of Staves: Increases the next 5 attacks dealt by the target ally by 60p. Additionally, increases the damage of the first attack dealt by target ally after this effect is applied, by 5 potency multiplied by the face value of the arcana.
X of Rings: Deals 100p in counterattack damage each time the target ally is struck, up to 3 times. Additionally, deals an additional 5 potency, multiplied by the face value of the arcana, for the first counterattack only.
X of Knives: Causes the next 6 Autoattacks to deal a second strike for 50p. Additionally, a bonus potency equal to the arcana face value is applied to each of these bonus strikes.
(if the concept of 'potency value not divisible by 5' is too much for the engine, make it 'first autoattack has bonus damage of '5 x face value'')
X of Cups: Causes the next 3 healer damage spells to cost half MP, and to strike a second time for 100p. Additional effects are not applied twice. Additionally, the first of these spells deals bonus damage equal to 5 potency, multiplied by the face value of the arcana
X of Crowns: Increases the next 5 instances of Magic damage dealt by 60p. Additionally, a bonus potency equal to the arcana face value is applied to each of these bonus strikes.
(if the concept of 'potency value not divisible by 5' is too much for the engine, make it 'first instance of magic damage has bonus damage of '5 x face value'')
X of Irons: Increases the next 5 instances of Physical damage dealt by 60p. Additionally, a bonus potency equal to the arcana face value is applied to each of these bonus strikes. Additionally, if the target of this card is the AST, the next 5 instances of magic damage are instead considered physical, allowing them to benefit from this card's effect
(if the concept of 'potency value not divisible by 5' is too much for the engine, make it 'first instance of physical damage has bonus damage of '5 x face value'')
The card effects (in terms of their damage output) have all been balanced against one another. In current Anabesios BIS, the Majors were tuned around all contributing roughly 30000 points of damage with their effect (numbers taken from several Samurai). Minor Arcana are balanced around dealing 300p, plus an additional 10-45p, based on RNG of the card and its Face Value. The one notable exception to this, which would be 'way stronger than anything else', would be Ewer and its effect of duplicating Healer spells, due to the difference between the strongest hit for SCH (Broil, 295) and SGE (Phlegma, 660). Or, if you prefer, WHM's Misery (1320). I could create some system wherein certain stronger skills consume more stacks than others to remedy this should it be such a pressing issue (eg it grants 5 stacks, Misery costs all 5 stacks, Glare and its equivalents cost 1, Phlegma costs 2, something like that)
Lastly, Minor Arcana would presumably also contribute Seals like their Major counterparts. As such, AST gameplay could revolve more around maintaining Astrodyne as a Huton style self-speed-buff, rather than the current odd 'slight buff for damage windows but it actually is a 90s effect in a 2min meta so it doesn't really fit very well'. Potencies of the Astrodyne effects would be changed to suit this, of course. I just haven't done the maths for that. Alternatively, we could just remove Astrodyne because it kinda sucks.