What happens after Alumite tools? (regrowth)

After Alumite tools, there seems to be nowhere to go. Regrowth has its own progression in tinkers construct, and I want to know a tool that has a higher mining level than alumite.

Right now, it's either go through the long and arduous quest for diamond essence to make diamond seeds (which, frankly, I'll probably do anyway, even though part of the quest requires you to have 48 stacks of blocks of charcoal) and add a diamond to my alumite tools, or go through thaumcraft and get thaumium, and I've never been through thaumcraft before.

Sorry if this looks messy, but tldr I need a tool with a higher mining level than alumite in regrowth.