Need help with white mage

[EaMett]

Your options will vary depending on your level and gear to be honest (not to mention your tank). There's some good advice here overall. I'll just offer an alternate "rotation" of sorts for dungeons. This is fine if you can spare the mana. At higher levels mana isn't an issue but it might be while you're leveling.

On pack pulls Largesse > Regen > Medica II (with or without swiftcast) > Aero III > Holy (your hots will regen a bit of hp during the stun) then just dps and use your ogcd to keep the tank up if you need. Of course the above is to be adjusted depending on the damage the tank takes, you may need to cure I/II and/or benison etc. etc.

As a general rule I also tend to refresh medica II and regen when I don't have the timings down for an encounter. It's clearly best to medica II after damage hits but there's no harm in maintaining it even if everyone is full HP while you learn your class and the encounters (and have the mana).

[Lyrica_Ashtine]

On pack pulls Largesse > Regen > Medica II (with or without swiftcast) > Aero III > Holy (your hots will regen a bit of hp during the stun) then just dps and use your ogcd to keep the tank up if you need. Of course the above is to be adjusted depending on the damage the tank takes, you may need to cure I/II and/or benison etc. etc.

This peeves me for a bit. Why is Medica II even in that "rotation"? For single target purposes it's not only inefficient in the MP category, but also in time. It's 700 potency on a single target and takes 3 seconds to cast. You know what else has 700 potency in a single spell? Cure II. If it's for area healing purposes for whatever reason, Asylum and assize will suffice.

[NamoNanamo]

This peeves me for a bit. Why is Medica II even in that "rotation"? For single target purposes it's not only inefficient in the MP category, but also in time. It's 700 potency on a single target and takes 3 seconds to cast. You know what else has 700 potency in a single spell? Cure II. If it's for area healing purposes for whatever reason, Asylum and assize will suffice.

You don't want to heal right away, he wants to put a lot of hots to keep the tank alive AND dpsing. That's why he Medica II.
I hope you understand.

[Cynfael]

You don't want to heal right away, he wants to put a lot of hots to keep the tank alive AND dpsing. That's why he Medica II.
I hope you understand.

Medica II takes too long to cast (assuming you are not blowing SC for it), costs too much MP, and heals too little upfront and per individual tick for a single-target situation. If you must have the additional healing, weave in a Cure 2 at some point for reduced casting time, less MP expended, and a Lily.

[Lyrica_Ashtine]

You don't want to heal right away, he wants to put a lot of hots to keep the tank alive AND dpsing. That's why he Medica II.
I hope you understand.

no, I don't. Medica II is 700 potency, Cure II is 700 potency.
If you heal after 10 seconds to make use of the 200 potency and wait another 30 for the remaining 500. Why not just wait the whole 40 seconds and slap out a Cure II instead for the same result. Except it:
It takes 0.5 seconds more to cast Medica II
Costs significantly less MP for each application if you use Cure II instead
You don't get lilies with Medica II