Dig conjures up trash items from the ground via witchcraft shovel, the number of skill points invested into Dig determines how many trash items you get. Currently, however, all items dug up with Dig are glued together in one stack or item entity.
Combustion will cause all items on the ground (owned by the alchemist) to explode, causing damage in a small aoe around each item, destroying the items in the process. The damage is modest and any good opportunities to use the skill are rare and far between.
So with both of these in mind, I would like to propose a change to Dig’s item stacks, turning each dig into a pile of individual items (a pile like what you mind find after blowing up a silver or gold lucky mob).
This will allow Combustion to be a legitimate attack and it’s power will scale in proportion to the level of Dig. Combustion also has an attack ratio of 1; meaning 15 items from Dig will produce 15 hits when using Combustion, or 1 hit per item. With hats/gear supplying bonus attack ratio, and 15 skill points in both skills, Dig and Combustion could become a very respectable combo.