I'm using Knaps narrow 4-1-2-1-2 and I'm having fantastic results with Racing Santander in Spanish la liga. Currently in second Place, behind Barcelona 4 with Points.
I have an average team since I just got promoted this season. Amazing tactic, both defensively and offensively.
https://community.sigames.com/topic/392889-warpigs-41212-narrow-diamond-tested-with-west-ham/
I'm not sure how it works with top team, haven't tried yet. But it should work since it's not a defensive tactic although it's the only tactic I've been able to hold Clean sheets without changing anything.
For me, this is the best Knap tactic. He has some great tacticts out there, but my impression is that they are quite leaky since he likes to use WB attack. However the 4-1-2-1-2 doesn't leak even if it uses attacking WBs.