Example:
You need enough haste to be able to cast every 1 second.
Mana Pool with raid buffs: ~15,000 (assuming T6 gear)
Lightning Bolt: 300 mana
Chain Lightning: 760 mana
Mana per 5: 500
Crit: 40%
After 1 minute:
Lightning Bolt: 18,000 Mana
After Elemental Focus Procs: 15,360 Mana
Chain Lightning added: 22,600 Mana
After Elemental Focus Procs: 20,776 Mana
Mana/5: 6000
You simply cannot last an entire fight with CL in your rotation once you get that much haste. You would be able to go no more than 2 minutes tops, with pots, then you would be waiting on regen and pot cooldown. If oom isn't an issue, then throw it in. I've found that I already kill any non elite lvl 72 and below in 3 shots or less. CL is only used to tag targets for me now. I only use it in raids on bosses. I am in T4/T5 gear.
