By the way, someone on Reddit asked me to quickly look at Fighters vs. Wizards. This is obviously really hard! So I just looked at DPR. Main findings: over 21 rounds, the Fighter's DPR after miss chance is about the same as the Wizard's DPR before accounting for miss chance!
How would a sword and board tempest cleric 15 with Str/Dex 20 and Wis 20 do on gross damage (yuk, yuk)?
(14) attacks with improved divine strike (259)
(1) 8th-level spirit guardians (108)
(1) 7th-level spirit guardians (94.5)
(1) 6th-level spirit guardians (81)
(2) 5th-level spirit guardians (135)
(2) 4th-level spirit guardians (108)
(1) 4th-level spiritual weapon (28) - only get 2 rounds
(6) 2nd/3rd-level spiritual weapon (114) - only get 2 rounds each
(5) Destructive Wraths of the Storm (80)
Total: 1,007.5
DPR: 48 * miss chance/half-damage on saves
ETA: Without crits...stretching my math skill already
More assumptions, obviously:
* Only get one three-round encounter per 10-minute spirit guardians
* DM only lets it proc once/round
* Don't miss a Concentration check
I might have hosed the math, but spirit guardians is a pretty solid spell.