I can only see one problem to combining attacks that were never in the series...
Relevance.
But for me, the need for it was taken out after... "Tiencha" from DBZBudokai2.
I can make techs, though I will say right now, I prefer making beams, but I have some Icons ive made that could be easily modified to fit the game's technique scheme. If the owners would wand a few, they would just have to ask nicely XD . But I have one stipiulation. If used, I kinda want credit if someone asks who they came from. =3