Here is an easier to read version, using Troxx's example with the 1x regular root:
Criteria
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1. Level 58 Shaman.
2. Mob does 10 DPS while slowed with Togor's Insects.
3. 7000 HP mob, A Ratfink from PoM Rat Maze.
4. Ogre Shaman gains 28.46 Mana per tick while canni dancing with overhead from self Regrowth and pet Celerity over 1 hour.
5. Iksar Shaman gains 33.44 Mana per Tick while canni dancing with overhead from self Regrowth and pet Celerity over 1 hour.
Ogre with JBB
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- JBB (32.8 DPS) + Hasted Pet (17 DPS) + Blight, Hammer of the Scourge weapon proc (2.2 DPS) = 53 DPS
- 396 HP recovered from Standing Regen (3 HP) + Regrowth (15 HP) over 22 ticks
- 1320 damage taken from face tanking (10 DPS)
- 22 Mana recovered from Standing Regen (1 Mana) over 22 ticks
- 175 Mana spent on 1x Togor's Insects
615 Total mana spent using the values above
132 seconds to kill the mob (53 DPS)
130 Seconds of recovery time when recovering 28.46 mana per tick via canni dance
262 Second of encounter time per mob including recovery.
Iksar without JBB using root/rotting
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- 2x Envenomed Bolt (2665 Damage) + 1x Plague (1270 Damage) + Hasted and Regened Pet (17 DPS) = ~37.2 DPS when factoring in DoTs will not be active for the full fight
- 501 HP recovered from canni dance regen (16 HP) over 31 ticks
- 658 Mana recovered from canni dance regen (21 Mana) over 31 ticks
- 640 Mana spent on 2x Envenomed Bolts
- 300 Mana spent on 1x Plague
- 175 Mana spent on 1x Togor's Insects
- 30 Mana spent on 1x Root
- 125 Mana spent due to losing 5 canni dance ticks while casting the 5 spells above
- 69 Mana spent on overhead from casting Regen on Pet for the full hour
431 Total Mana Spent from the values above
188 seconds to kill the mob (37.2 DPS)
77 seconds of recovery time when recovering 33.44 mana per tick via canni dance
265 Seconds of encounter time per mob including recovery.
When you factor in all of the overhead, you will see that the JBB Shaman clears the encounter 3 seconds faster using Troxx's exact example of 1x Root, 2x Envenomed Bolts, 1x Plague, and 1x Togor's Insects. This example does not take into account the DoT Shaman's increased chances of spell resists (spending more mana), root breaks (spending more mana, taking damage), and requirement to canni dance perfectly while in combat (gaining less mana when missing the server tick).
This is why JBB is the better leveling tool from 45-60. Even when comparing a Shaman race with Regen to a Shaman race without Regen, the JBB wins. Simplifying your playstyle and reducing RNG while clearing mobs at the same speed is better in the long run. You save a good amount of time and mana by avoiding the extra RNG elements that root/rotting has.
For people who want to see more details on some of the calculations: