I found the combat was too time consuming so I decided to use the following house rules:
1/initiative is rolled for the single character and cannot be 'passed' to others.
2/Rally's step is not used anymore.
3/Basic defenses (block, dodge, parry) and advanced versions can be used every turn ( recharge ZERO) but only against ONE attack and cannot be stacked (only one defense against a single attack). Only a character with all 3 defenses can try to hinder 3 different enemies attacks.
4/critical wound are assigned even if the attack's damage is not greater than the soak value.
5/ A/C/E points are not used. Game Master assigns permanent white, yellow or black dice as for skills and defences.
6/critical wounds effects are not applyed to standars (not Nemesis) enemies which receive extra damage = to the critical's rating.