Alright, after some hours of digging through all the files (there seem to be tons of unused ones, countless versions of the aparently same spells and whatnot...) I finally found out which files are for which spells... Problem is just that I don't know all the biped spells there are and so I'm still looking for fitting replacements for...
Unrelenting/Grazing winds
Snarl
AoE resistance buffs
True Grit and Promotes
Maybe Improved Prime Bolt, even though I like the original one.
So whoever has suggestions, fire away.
And here's a screen of my current Blast/Barrage/Tempest/Gust. A little over the top perhaps but at least it matches the spell names and descriptions closer than swirly blue dots of fail. XD