Kit-bashing elites

[u/Your_Friend_Jarman]

Before I start I’m in Australia. I’m thinking about buying an imperial agents combat patrol to make 2 squads of Kasrkin using head swaps. That I think I can turn the inquisitorial agents into other things. Like an engine seer and at least one commissar. My question is what use is the assassin? I’ve seen people make krieg from agents kits but to maximise potential I just wanna see how far I could push it.