Development and updates on this website have come to an end. There won't be any more update in the foreseeable future.
More details here 
Unit Analysis by Team BethelFrankel
Class
Detonator with spammable active(s).
Overall
S- (S+ at BT3)
Advantages
+Incredibly High Damage at BT3
+Straightforward kit
Disadvantages
-Lags behind Thunder’s best DPS options, Florine and Reinhardt, with 0 utility to boot
-Subpar performance at BT0
Explanation
Barring the fact that Leyn has a second skill, he’s a fairly no-frills DPS. However, there are a few caveats to his impressive rating. First, he’s very reliant on BT3, which improves not only his total damage, but also his quality of life. Before that, he’s arguably worse than Tessa, a 4-Star. Second, you need to do a bit of face-tanking to get the most out of his 0CD skill, which can cause problems on some stages. Nonetheless, he’s a fairly reliable Detonator, and a good addition for any account.