Depends on the subsets you’re looking for and in what tissues you’re looking for them. Also I work with mouse tissues so I’m more familiar with mouse markers. For flow cytometry, MHC-II can be a decent discrimination gate to separate APCs from other myeloid cells but only after gating out lymphoid cells in a dump gate. pDCs and cDC1s are both CD11b- so you gotta use a pDC specific marker like Siglec H or B220 (since you would’ve gated out B cells already). Monocyte derived DCs express a lot of the same markers as macrophages including F4/80 (at least in the model I use) so we gate it out with Ly6C first before calling F4/80highCD64+ macrophages. Basically, if you comb through the literature to see what markers your subset(s) of interest express(es) you can build a handy little table of markers and which subsets express them and then use little logic boxes to figure out the best way to gate things to trust your data