Just hit lv60 BLM

[AncientCrystal]

Help on rotation? How do I incorporate Blizzard IV and Fire IV? I can tell that I now have pretty much my main rotation before I hit my SB moves.

[Canadane]

Use Fire IV as much as possible. Using Fire I to keep your stance going.
When low on MP, Blizzard III to swap stances, Blizzard IV to get hearts, optionally Thunder of needed, and then Fire III to change stances. Back to Fire IV son.

[Ryallen]

Fire IV is now your main DPS spell. It costs as much mana as Fire I does and deals a great deal amount more damage. The only thing it doesn't do is refresh your Astral Fire stacks, after you cast Fire IV about 3 times, 4 if you're feeling lucky/used Swiftcast or Triple Cast, cast one Fire I to keep Astral Fire up. Blizzard IV is a bit weirder, however. It gives you three casts of any Fire spell without the increase to mana cost that Astral Fire normally gives. This goes for any spell, from Fire 1 to Fire IV. Obviously this means you want to use it on Fire IV if you can. I see a lot of people talk about how they don't use Blizzard IV as it's just more efficient to just use Fire IV and revolve back to Umbral Ice to regen mana. I couldn't tell you what's easier, so just experiment and see what works out for you best.

[Brightamethyst]

Fire 4 pretty much replaces Fire 1 as your main fire spell. You only need to cast Fire 1 to refresh Astral Fire.

Blizzard 4 you only need to cast once per umbral to get the Umbral Heart charges. Beyond that it's not worth the time or MP.

[AncientCrystal]

You guys are awesome appreciate the help!