Getting a useful amount of mana recovery wasn't something that could be accomplished with just one or two pieces of equipment. With the current stats of equipment, as limited by the maximum equipment level, a set of many pieces of equipment was needed. Stolord right now had many pieces of Level 80 Silver equipment, whose stats weren't visible, but for stats like mana or health recovery that had a visible effect over time, it could be directly seen whether or not they were present. On Stolord's body now, there didn't seem to be any such equipment.
And carrying an extra set of equipment into a match was something that hadn't been done for a long time. A set of equipment increased weight, which became a large burden on this high-level professional stage, especially since this was now the highest-level playoffs competition.
But Li Yibo didn't dare use common principles to draw conclusions.
