Originally Posted by
Freyt
When I got Ruin II I didn't know why it was an upgrade. Just realizing it was instant cast was enough to convince me about the ability.
It's a DPS increase. The time you save not casting IS used for other things, and you never cancel your spell to avoid AoE's.
It's true you might lose out on Fester usage, but I kinda think it's worth it. Energy Drain is already instant damage itself, it's not as if you're only using it to heal your mp, and it requires very little setup compared to Fester. Not to mention I generally have 3 ticks of Aetherflow ready for when the skill itself comes off cooldown, then I'll just use Energy Drain > Ruin II > Energy Drain > Ruin II > Energy Drain > Ruin II > Aetherflow, only cutting into that if I need to reapply a DoT. It's a bit of instant damage for the SMN which it normallylacks, so it's a nice change of pace. Fester probably will result in more damage in the long run, though I'm not sure about that when you're comparing using Ruin instead of Ruin II.