Which intensity should I choose?

Intensity does not change your target — it changes how strictly AutoPPC holds you to it: how much evidence before acting, how far a bid may move at once, how quickly something is killed.

Profit-first when margins are tight or cash is constrained. Balanced for almost everyone. Launch for new products needing velocity. Aggressive when you are deliberately buying rank and can absorb the ACOS.

You can change it between runs. It affects future proposals only — it never retroactively re-judges changes already made.