I've literally just got to the part where Redmask is introduced so I'm just skimming this thread to avoid spoilers but as for his axe this is how I imagined it:
“You make worlds, worlds inside your head and worlds outside,
but only the one inside counts for anything.
It’s where you find peace,
acceptance.
Worth.”
It's hard to say, really. The axe, fine, because it was clearly only an "axe" in name, not in actuality.
The whip is rather harder... it seems unlikely to be effective in close combat, but you never know. It was stressed a number of times how incredably difficult to master the weapons were, (Geometry Dash) so without the perfect technique they would be fairly ineffective.
I kinda imagined it as Leomans flails. Not incredibly effective unless mastered. It seems that his Cadoran whip took many years of practic although there is a scene in Drene were he beheads people
i could be way of the mark here but did it not say in the book that they were made and mastered by the tribes ancestors for fighting the K'chain Che'malle. I dont have reapers gale on me so i cant check!