SMN Ruin II vs III help

[Zerathor]

Global cooldown is the factor you're missing. Casting r2, you wait your gcd before doing another action. Casting r3 is the same duration. Meaning in the same period of time, you will get off just as many r3s as r2s, so you're wasting that 20 potency.

Ruin 2 is only for 3 purposes:
-prolonged movement where slide casting r3 would prove too difficult
-weaving ogcds
-bahamut. Though mostly for the same reason as point 2.

[Rosa_Frandlia]

Global cooldown is the factor you're missing. Casting r2, you wait your gcd before doing another action. Casting r3 is the same duration. Meaning in the same period of time, you will get off just as many r3s as r2s, so you're wasting that 20 potency.

Ruin 2 is only for 3 purposes:
-prolonged movement where slide casting r3 would prove too difficult
-weaving ogcds
-bahamut. Though mostly for the same reason as point 2.

One other place I've found doing maps, all the aoe's put the HP really low on all targets and by the time you get done casting ruin 3 the rest of the dps has killed your target. That's a good time as well for ruin 2.