Immense

Forge to 31.2.13

Atmospheric to 1.4.1

Botania to 387

BuzzierBees to 1.5.2

Collective to 1.35

Controlling to 6.1.5.6

DimDungeons to 1.07

DoubleSlabs to 2.7.7

JEI to 6.0.2.12

LetSleepingDogsLie to 1.1.1

Mekanism to 9.10.9.422

MekanismGenerators to 9.10.9.422

Patchouli to 1.2-35
Placebo to 3.1.0
RandomPatches to 1.22.0.0
Rats to 5.3.2
Gates to 1.6

RefinedStorage to 1.8.6
SmallerNetherPortal to 1.15-1.4

Slice of Life: Carrot to 1.9.7

Swamp Expansion to 1.7.3
TerraForged to 0.0.15
EndergeticExpansion to v1.3.2.

UpgradeAquatic to 1.7.1

Waystones to 6.0.2

FarmingForBlockheads to 6.1.5

SilentGear to 1.9.1+120
SilentLib to 4.6.5+58
Silent's Gems to 3.5.6+89

SuperMultiDrills to 2.1.0+4.

This brings a lot of reverts to changes from previous versions of this pack since the Materials system is fully implemented (that said, it is still WIP)
None of your tools should break, but just to be safe make backups of your worlds.

Added: 
YUNG's Better Mineshafts

Probably the last update. 1.15 is EOL.