Blood Rush and Gladiator mods still sometimes stack over x11 (came across this by chance a few times). As stated it is still possible to stack Blood Rush past x11 combo, it seem to happend if you follow the steps bellow :  1. You aren't the host. 2. You have Naramon focus school with Power Spike active. 3. Get x12 combo counter and switch to operator mode, then tether a few enemies using Magus Lockdown and wait in operetor mode for the combo counter to go down by a bit and al