MMORPG.Com's @ProtoSori, Raging Spirit Summoner {Ambush/Invasion}

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Zinsho wrote:

Just for sake of comparison:

DPS values for Raging Spirit and Zombies at levels 1, 10, 15 and 20. Assuming no passives, gems or auras for additional damage/attack speed. I have verified that adding the 20% Attack speed and 105% Damage will not impact the results.

Raging Spirit:
01 : 26.05
10 : 141.63
15 : 326
20 : 595

3 Zombies:
01 : 19.69
10 : 297.19
15 : 751.88
20 : 1456.88

8 Zombies:
01 : 52.5
10 : 792.5
15 : 2005
20 : 3885

10 Zombies:
01 : 65.63
10 : 990.63
15 : 2506.25
20 : 4856.25

Number of Raging Spirits required to output same DPS at same level:
Level : 3 / 8 / 10 zombies
01 : 0.5 / 2.0 / 2.5
10 : 2.0 / 5.6 / 7.0
15 : 2.3 / 6.2 / 7.7
20 : 2.5 / 6.5 / 8.2

When you factor in a possible 75% Fire Resistance affecting 50% of Raging Spirit's damage, Raging Spirit will end up only dealing ~62.5% of the expected damage.
62.5% = 5/8ths.

# of Spirits to match DPS divided by 5/8ths = < 13.2 (8.2 * 8/5 = 13.1). This does not account for Travel Time since that is not very feasible to factor in.

So Cast on Critical essentially works out to being a very large Cast Speed bonus for Raging Spirits at the cost of 2 Gem Links and whatever additional Skill Tree nodes are required to obtain the appropriate attack speed and crit chance.