It depends on if you want to stay with savage length shocks or not. I run 4 Unlimited Engineering Supermaxx shocks in conjunction with New Era upper arms that allow the use of t-maxx length shocks. You can use the Nova shock towers as well to use the stock arms if your not affraid to have aluminum towers.
I run only 4 and I run pretty damn hard. 6 feet of air all day long. If I ran 8 shocks, it would be damn near unbreakable. I did break a shock piston once, but I was about 12 feet in the air and landed hard on the left rear tire first. Snapped the piston in half, but that was the only damage.
Well, that was the only "shock" damage. Upon impact, my exhaust went flying and I busted a stock t maxx rim and also moved the engine to mess up gear mesh.