after a first place spot on a leader board i may be contemplating my build
anyone have suggestion for some builds

really depends on the map, but eqiupment interaction is usually the one to go for.
for example in withdrawal you WILL need maximum equipment interaction speed because bagging cash, searching computer, power box, alex shaw disguise gets affected by it
you will also need a lot of sprint time because of the cash carrying. ( and be a technician)
for other maps though, use an infiltrator instead. but equipment interaction is super super important for the smallest interactions, etc. photograph removing in financier, cashe. power box rewriring in scientist, lakehouse. screwdriver speeds in scientist, the cashe. It is just very useful.

The class to use depends on the mission too.

@MarcusfriendAlfredMarcusfriendAlfred
I agree that loadout/class/perks are dependent on the map.
However, Interaction perks do not decrease the time it takes to bag cash, nor search the computer, nor rewire the power box, nor remove paintings (not sure about celebrity disguise or scredriver). The reason you take max Interaction is to speed up the keycard scrambler and Breaching Charges (if loud, also include C4).