Maiming Strike provides 90 percentage points to a weapon's critical chance on slide attacks.
This stacks with Cat's Eye which provides 60 percentage points to critical chance.
Maiming Strike's bonus is applied after other critical chance mods, but before Blood Rush. For example, a Galatine with a max rank Maiming Strike, True Steel, and Blood Rush at a 3.0x combo multiplier will have a [10% × (1 + 60%) + 90%] × (1 + 165% × 3.0) critical chance on slide attacks.
The +90% critical chance provided by Maiming Strike is multiplied by Blood Rush and the set mod effect of Gladiator Mods which leads to very high critical chances on slide attacks. See the full equation for details.
Combining with Berserker on any melee weapon allows players to easily generate attack speed, with a stronger effect than Fury, for the same cost.