Any tips for when to use what card for each moment?

[Zoralink]

Spear is excellent if you see a SMN about to aetherflow or a BRD about to reload. (You have to be very aware to notice these things) Otherwise it's generally a decent pick for NIN/DRG/your tank. It's terrible for BLM. Arrow is a BLM's best friend as well as balance if they are going into astral fire phase of their rotation. Bole I generally use for royal roading, though if I know a larger pull is coming up I spread it to hold it for later. I generally only bother using bole if I can combine it with an extended royal road. Arrow in general is just a good DPS boost, though avoid using it on a physical DPS if you can. As for spire usage, my general priority goes BRD -> DRK -> NIN -> Everyone else. Many times I eat it for royal road.

Confusing paragraph aside:

Spear: General use - NIN/DRG.

Specific cases - MCH/SMN.

Bosses - Spread on pulls beforehand, then fish for a arrow or spear to get the expanded version. Shortening everyone's cooldowns on pull is nice.

Arrow: BLM/BLM/BLM/BLM/BLM. Otherwise it's decent for any DPS, avoid physical if possible, though it is relatively meh on SMN.

Bole: Situational. Nice if doing large pulls for your tank. Otherwise nom it for royal road.

Balance: Generally okay on any DPS. Sometimes better to just eat it for royal road if near the end of a pull. Can be nice to use similar to spear on boss bull. Good for when a BRD/SMN are refreshing their DoTs.

Ewer and spire: Almost always used for royal road. Occasionally ewer on an aware BLM during their transition into fire phase. Spire is for physical on longer fights.