Thanks to 武器大师's K/D/A and utility, he has a somewhat poor overall win rate. He does very well in the late game, with a winrate of 50.8% in that phase. Unfortunately, he does terribly in the early game, where 武器大师's win rate is 46.6%., The difference between his best and worst game phases is about 4.2%. This sizeable difference makes it clear that his power spikes and fades in different parts of the game. Plan well.
In the current meta, 武器大师 is incredibly popular. He has been selected in 7.5% of recently ranked matches. A lot of players see him as a threat. He has been banned in roughly 11.9% of League of Legends rounds.
You will see him typically played in the top position. However, that is not the best position for him. The best win rate position for 武器大师 is jungle (48.9%). At this time, 武器大师's meta game is focused on dealing damage. In particular, his kit should mostly be centered around physical damage. Additionally, he is an ok magical damage dealer champ. Supporting others and crowd control are the least significant part of 武器大师’s kit.
If you are not comfortable with his abilities and gameplay, you may find it difficult picking him up for the first time. Most players believe him to not be a difficult champion to get good at. 武器大师 mostly deals physical damage (59% of his total damage). He also deals a large amount of magic damage.
武器大师 deals a good amount of damage during a normal round (19,610 damage). You could focus on building him as a damage dealing champion to destroy your enemies.
If you are looking for a dominating damage dealer, then you should maybe consider this champion. He has one of the top kill rates on the Rift amongst all champs. Additionally, he has a fairly typical average champion death count (6 deaths). Furthermore, 武器大师 has a low KDA ratio (1.7) with 4 assists.