People that tabletop game often are skilled at looking at rolled dice and calculating totals with mental math, but this is a skill that is developed over time. It might make the game more accessible to more new players to 'recommend' (visually indicate) a suitable combination of the active dice when mousing over an item.
For example, mousing over Elven Arrow might highlight a combination of active dice that equal the cost to transform back to Elven Bow. Mousing over Elven Bow might highlight the combination of dice that would inflict the most damage.
This 'hinting' stops short of making any decisions on behalf of the player, but it could help make the learning curve less steep for people less experienced with tabletop games.