Hey everyone, I've been scratching my head over this for weeks now. So last month I launched this layered campaign setup where I stacked pop traffic sources on top of some display and email follow-ups, thinking it'd boost overall conversions nicely. But when I look at the reports, it's a total mess figuring out which layer actually deserves the credit—last click grabs everything, but I know the earlier touchpoints are doing heavy lifting in warming people up. Anyone else dealing with attribution headaches in these multi-layer setups? How do you even start sorting out fair credit without overcomplicating everything? Last time I tried tweaking models my CPA shot up unexpectedly, so now I'm paranoid. Would love any real-world tips or war stories from folks who've been through this grind.