On the Arcana Gauge, Purple outline on the card signifies ranged/healer DPS cards and green/blue outline on the card is the melee/tank DPS cards.

1. Play the card that benefits the player the most with it. Cards are split into melee and ranged cards.
Tanks and Melee DPS gets Melee Cards.
Healers and Ranged DPS gets ranged Cards.
The instances where you want to give tanks and healers the card is when the DPS does less damage than tanks, DPS is dead, or DPS already has a card. Cards do not stack. If you give a ranged DPS an Ewer, then a Spire, the Spire overwrites the Ewer. This also applies to Minor Arcana - Lady of Crowns can be overwritten by any other cards and that's a nono.

2.Never undraw.
Pre lv 50 - giving a card is still a DPS buff, even if it's 3% for the wrong role or 6% for the right role.
Post lv 50 - you can minor Arcana to change a seal you already have into a buff that gives 4% or 8% without affecting the gauge.

3. Redraw is for seals or for a card to minor arcana when you have full seals.

4. Don't delay your opener with redraw.
This is mainly lv 70+ because sleeve draw gives you 3 more cards to play.
Don't redraw to get the right card, just play all of them as they pop up to get Divination ready as soon as possible. It's worse to delay Divination and mess up with the opener where everyone's rotations get a power spike than to get a perfect Divination where everyone already used their oGCDs.

Draw = 30 seconds recast -> 4 cards can be drawn within 120 seconds.
Divination = 120 seconds. You have 1 free draw if you don't get the seal that can be minor arcana'd.
Sleeve Draw = 180 seconds. Every 3 divination windows have 2 sleeve draws .