During individual battles, the stronger the Ability X the better. It would be alright as long as it had enough destructive power. However in team battles, although destructive power was still important, control would be even more important.
Abilities like Luo Fei's stealth and weakening would be very effective. This d*mn dude was definitely fearsome. When they went up against Olivios, it was exactly the case. His weakening Ability X was fully utilised and Olivios had turned from a primeval raging beast to just a raging bull. The level had decreased by a lot. Coupled with the fact that others weren't weak too, it would mean that they weren't giving Olivios a chance to demonstrate his capabilities at all. The follow up and catching the right opportunity of others would be dependent on the commanding and leadership of the leader and the cooperation within the team.
Zhang Shan believed that the core of Lear's team was the damned fatty, Luo Fei's, ability.