Yes. In room with door to boss guarded by the giant are spaces in corners to jump down. Be wary of strong enemy below.

I believe spells like Catch Flame, and Flame Slinger are both Church spells, basically. Since Corhyn sells them. Fire Giant spells are considered heresy. Essentially the starting spells don't fall under any family. They are designed to be replaced. When you get a seal that improves a factions spells, you'll likely use those spells.

I mean, the Godslayer Incantations are a type of Pyromancy, and the Godslayer Seal is easier to get, with pretty great scaling.
There is no way to reach Consecrated Snowfield without fighting Morgott, because it's only reachable through taking the Lift of Rold.

Morgott is not that far into the game if you do just the optional stuff. I've already made several PvP characters and all of them are in the Mountaintops for +18 bell bearing. You just need 2 demigods, an optional boss to enter Altus plateau (or use 1 of the other 2 ways to get there bossless), Draconic Tree Sentinel, Godfrey and Morgott. It takes under 4 hours and I'm no speedrunner.

Good info, though you can't fast travel out of dungeons.

I tested. And by tested I mean I'm capable of reading. And with that knowledge. I can confirm it only boosts Giant flame incants.

how much faith did you have.

it boosts everything except catch flame and flame sling. (and godslayer stuff too of course)
considering brother corhyn sells them naturally perhaps those two are actually considerd erdtree school

It also appears to be closer to a 20% buff than the standard 10% so the slightly lower incant scaling shouldn't be an issue