Succor - Impossible to get full potential?

[Marcusow86]

Is it to heal the raid or to keep them alive? because there is a difference between the two.

To heal them is to keep them alive.

Anyway, my opinion is to not see Succor as something you can spam. You basically cast it once or twice and let your WD or WHM's medica II fill the rest up slowly. The wonderful part of this game is that once AOE damage is dealt, you will not be hit by another for awhile.

Also, i believe someone have already stated. Succor should be precasted, why? Take titan for an example. Medica or Cure III is an active heal and requires cast time to execute (without swiftcast or coz), if i pre-casted Succor, the first stomp damage is mitigated and the timing for WHM and myself to cast our AOE would be just nice to top everyone off before we need to dodge the damn plume (which always come after stomp).

[Asdamine]

To heal them is to keep them alive.

Not necessarily. Let me give you an example -
If an attack is 5100dmg and the tank only has 5000HP, no amount of heals can keep the tank alive.
If an attack is 5100dmg and the tank only has 5000HP, stoneskin/succor can keep the tank alive.

You can keep someone alive by not using a healing spell, whereas healing could fail to keep someone alive. Therefore, Succor is a tool necessary to add that HP sponge to suck up the damage for the party.

Now, lets just say Succor acts as a HP sponge, then the question is - is it working effectively? This is a question the OP is really asking. Then my answer is a definite yes.