ideal is horizontal, like a panhard rod, so movement is equal for up and down, and your coil overs to work on one third up travel, and the rest in droop.
Back in the late 90's, doing big cruiser lifts, turning the control arm upside down so it went over, rather than under the diff was the way we achieved this.
On my current vehicle, I have lowered the back of the front arm mount by the amount of the lift, keeping them slim, it has allowed the full travel in droop of the front still, as well as having the arm horizontal with 3" of lift.
I have seen vehicles punch the rear of front control arm mounts off the chassis, because of the big angle, and constant thumping that is transferred from this design issue when doing a big lift.
I do like to work on the biggest dia tyre, and the lowest amount of suspension lift, to achieve a good balance between C.O.G and clearance.
My current vehicle, which is very similar to cruiser in wheelbase, chassis and supension set up, I use 3" lifted springs we designed with a 4" longer free height, running 10" front Fox 3 tube bypass shocks, and rear 14" bypass shocks, so the springs stay captive, and with the back of front arms dropped, they are horizontal, as well I have given the vehicle 1.5 deg neg camber in the front for better turn in, and run 37" pro comp 3 ply muds on 17 x 9 roby gordon alloy rims.
I cut the fenders to fit the tyres, so as not to have to got to high.
I built a 40 series 7 years ago, using 60 springs, which we modified, late spring eyes, and converted the front to rear shackle running 38's with no body lift and 2" suspnsion lift, we made it 98" wheelbase, moving front forward, and rear back, 4w disc brakes, power steering, bilstein shocks, and 454, and the suspension, and wheel alignment specs made the vehicle extremely stable, even with no sway bars, and an rti score of well over 1000 [was a pic on slee site with one wheel on a 44 gal aus [205lt] drum, with fuel tank nice and low, and spare flat on the back floor.
my general rule of thumb is to widen the track buy the amount of suspension lift, or more, to help stability, when putting a vehicle together, as well as keeping all the weight between the chassis rails, and between the axles, to help prevent the pendulum effect.
I better not let my wife see this, she'll want hers more 
