Basic code was written back in May when the US got to test Halion (Heroic) on the PTR. Tested/Updated in 25M Heroic and 10M Normal.
Non-US English locales are NOT SUPPORTED.
The timer for the first Meteor in P3 is off, it's dead accurate for all subsequent casts.
The moment the version of the Halion support contained in DXE_Northrend exceds "009", this will probably not load/function. (As of v490-26, the version is "002", so it's safe for a while. If this is a huge issue, stick to DXE v490-25 or below.)
If you get an error similar to:
Interface\Addons\DXE\Core.lua:439: Encounter halion already exists - Requires unregistering
Comment out the last instance of DXE:RegisterEncounter(data) in
20100701 - Added enrage timer. The warning for standing in fire trails should be triggered off SPELL_DAMAGE.
20100630 - Initial public release.