I was alone in the world, and had nothing to depend upon but my wits and a clean reputation, but these were setting my feet in the road to eventual fortune, and I was content with the prospect.

我独自一人在这个世界上，除了我的机智和清白的名声之外，没有什么可依靠的。但这些都是我通向最终命运之路的跳板，我对这种前景感到满意。

youdao

I'd like to manage at the very highest level and pit my wits against the best.

我希望在最高水平上管理，与最优秀的人斗智。

《柯林斯英汉双解大词典》

I could hardly keep my wits together in the presence of that food, but as I was not asked to sample it, I had to bear my trouble as best as I could.

一看到那些食物，我难以保持冷静。但既然没有人要我尝一尝，我只好尽量忍受我的渴望。

youdao

There was no money for anything, so I had to use my imagination and rely on my wits.

WSJ: Girl Groups' Go-to Guy | Jeff Barry | Cultural Conversation by Marc Myers

Put it another way: I live on my wits.

ECONOMIST: Living on his wits