I would mount 2 so that they are as I mentioned earlier, i.e. back under rack so bonnet and wing tops in shadow, switch these so that they can be on or off with main beam and lower mounted spots. These will be for night driving.
The other four can be switched so that they come on independantly for illumination when not driving , and can be mounted for bling effect.
I have halogen headlights, and two driving lights 100w mounted in middle of vehicle at level above winch and on top of bull bar dead centre a 10" bull lamp long range 100w . I have 2 x100w mounted under roof rack set back . I wired them so that , the ones under rack can come on on their own , or with high beam, and the 3 lower spots are wired so that they only come on with high beam, this allows you to run with all lights on at night on all types of highway , but go to only 2 dipped headlights if meeting oncoming vehicles. Good lighting is your main defence rather than bull bars when trying to avoid local fauna . HTSH