The signal chain is Brothers AM -> Lost + Found -> Julianna in front of the AM4, then Tensor -> Sunlight -> Deco in the stereo insert of the AM4.
For the Deco, on the Tape Saturation side, Saturation just above 9 o'clock, Volume 1:30, Tone 2 o'clock gives mild tape saturation at the end of the chain with a neutral-ish EQ curve, and then I can turn the Tone knob up from there for more high-mids and highs.
I use the Doubletracker side in Wide Stereo mode for fake hard panned doubled rhythm parts. It is also available as another option for chorus, slapback, or tape echo (and tape flange, but historically I don't love flanger sounds), if I find myself wanting more blocks in a preset. But "what if four blocks is not enough" has mostly been a hypothetical for me so far. (Edit: well, for core tones, four blocks is plenty for me, and then I use the Lost + Found, Julianna, Tensor, and Sunlight to embellish from there for less traditional sounds, with the Deco providing end-of-chain mild tape saturation and fake L/R double tracking. And I had the Brothers AM already, so why not.)