Don't forget
In a rotation of SLA CM/SLA MM/CM/MM,
You get 10 mMissles, and 14-22 cMissiles
The difference in having max Caster Level, if I understand the mechanics correctly,
CL11: 10mm+14cm = 24 missile/rotation
CL13: 10mm+16cm = 26 missiles/rotation
CL15: 10mm+18cm = 28 missile/rotation
CL17: 10mm+20cm = 30 missile/rotation
CL19: 10mm+22cm = 32 missile/rotation
The results more realistically per 2 (odd) caster levels for a full rotation of the spells is:
TotMiss %DamInc |
CL11 24 0% |
CL13 26 8% |
CL15 28 17% |
CL17 30 25% |
CL19 32 33% |
I'm not saying this criticize lower CL Shiradi builds that multiclass for things like free SP from FvS or in your case for Blade Barrier. And casting Blade-barrier changes the calculus on your spell rotation obviously. Since you end up doing lots of damage from BB and in all build cases from EB every 30 seconds, that lowers the overall damage trade-off from losing chain missiles due to CL. Also, you can potentially get more procs of BB on a mob if you move well and depending on the speed of the mob, and over a 10 second spell rotation with a BB down you could pretty easily average 2 BB procs due to movement. Additionally, outside of Shiradi procs, BB tics tend to do more damage than a Chain Missile.
And of course, with a 10 second CD on SLA CM, a 6 second CD on SLA MM, and 3/2 second CD's respectively on the non-SLA versions, you could argue that rotation isn't optimized, though that is really an argument of Number of mobs attenuated by time to kill. But this wouldn't make that much of a difference anyway. If it takes about 1.1 seconds to cast a spell, and a mob wouldn't die after the above 4 Spell rotation, you might want to change up the rotation slightly.
Anyway, not sure if this helps you gear at all, but I did the math anyway because I got curious, so I thought I would share it.