Firelands/Ragnaros: Improve various timings

[stako]

Wrath of Ragnaros

• Added initial cast, always 5-6 seconds into the encounter
• Has a 25-26 second cooldown - remains the same for both normal & heroic
• Sulfuras Smash will put Wrath of Ragnaros on a 10 second cooldown unless it's already on cooldown for a longer duration

As the 1st one comes in at ~5 seconds & it's got a ~25 second cooldown, we would expect the 2nd one to come in at ~30 seconds (1, 2, 3)

However, Ragnaros will typically begin casting Sulfuras Smash at ~30 seconds (2.5s cast time). This will cause Wrath of Ragnaros to be cast about 10 seconds later (1, 2, 3)

Using 12.5 seconds instead of 10 because we need account for Sulfuras Smash's cast time. (The Sulfuras Smash trigger is using SPELL_CAST_START, not SPELL_CAST_SUCCESS)

Phase 4 Callback

• This was triggering a Win call on normal mode which is no longer needed since we've got the encounter ID's now

Lava Waves & Molten Seed

• More accurate timings