Allow me to elaborate on this a bit.. Those three tubes you have going diagonally at the rear are offering less then if you just had a single tube going straight from the rear frame/crossmember to a convergence of the c-pillar rollbar structure and x-brace. The x-brace, c-pillar uprights, and rear supports should all intersect on a imaginary single point. lots of bendy tube certainly does look cool but you really want as few bends as possible.
furthermore, suspension pickup points such as upper coilover mounts should be at a node, not fall in the middle of an supported tube. I would just mount them to the x-brace and run a short tube to perpendicularly from the x-brace to the C-pillar upright. Less tube, less weight, less compliance, more strong, more cargo area too even?