"Bay of the Moon" and "Growl of the Lioness" Or "Griklor's Feralgia" (GF) and "Growl of the Lioness" (GotL) : Does GotL overwrite GF Griklor's Growl on warder?)
i never use Growl. I would exclusively use Feralgia (for the Growl effect and Pet swarm), to save the spell slot. Historically i would have use 5 different nukes, including 2 different Lance spells, since the previous and current version did not share a timer. Now that our 122 Lance and 117 Lance spells share a timer, i'm considering putting my 125 Shriek at the Moon in place of my 5th Nuke, especially since they upped the crit rate on our <blank> at the Moon spells. At level 115, i would probably go with Feralgia (for the Growl effect and Pet swarm) and 5 nukes, instead of 4 nukes + swarm
You can use feralgia to gain the benefit of all of the listed spells, it costs a bit more mana but I'd rather have the extra spell slot and not have two cast times of 1.5s, even in group content.