Murderok Level Up 

Upgrade: Heavy Hitter
New: Adrenaline

Customs:
Upgrade: Manbreaker; Murderok has well and truly ensured that he's learned how to craft the oversized bolts for the Manbreaker and has several custom head designs to affix upon them, such as the gutspiller, a wicked moon-bladed bolt head designed to spill a mans guts into the ground (or just bisect him completely if he's close enough) and a serrated design for biting into stone and wood to affix climbing ropes (or make it REALLY messy to pull out of someone)
New: Gore; Murderok uses the heavy horns during a charge to gore his enemies, the sight is messy and hellaciously demoralising to most folk who really do prefer the sight of most people with their insides, well, inside instead of gracing a minotaurs horns like a necklace of sausage meat.

Gryff Level Up 

Upgrade: Charger
New: Endurance Training

Customs:
Upgrade: Battlefield Physician; Gryff has become more proficient at dealing with battlefield injuries and even some off the battlefield injuries.
New: Reverse Physician: Gryffs talent at basic healing and stitching someone up has lead to an increased skill and knowledge of where exactly he can hit to open someone up in the optimum manner with a bow or blade. At least a basic knowledge at it anyway.