Whether solo or in a section, I prefer one mic on brass. I use a ribbon mic set about 2 to 3 feet from the bells of the horns with the players standing pretty much in a line. If it’s a solo horn I usually walk around the instrument as the player plays to find the best spot. Most times it involves the mic being a little off axis – meaning to the left or the right of the horns bell – never directly in front. If you really want individual control when recording a section, almost any mic will do – especially a dynamic or condenser mic placed close to the individual horn.
When I mix horns I roll off some lows, add a little punch between 700Hz and 2K and maybe roll off a little top at 10K. You don’t want them shrill or muddy and given your particular track you’ll adjust the EQ to fit.