I don't think the one shock idea would be stable at all.
I have heard of people that just cut the spring shorter. Not quite hardtail, but a little stiffer to be sure. Adjusting the angle of the shocks would also lower it. Whether that be by using some kind of struts for the top connection or welding the lower mount back further.  I've looked and not found any such "kits" for lowering a Savage.