nope. I'd do it in the order I listed. each will incrementally improve the body roll. sway bar is a large expense. rubber mounts, and shocks will make a big improvement. tires will make a big improvement in feel of the road.
for which end to work most... you'd have to consult a road racer... too stiff a rear bar can affect handling badly... it's gotta be balanced, although I think the stock 123 bar is pretty wimpy in the rear...

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!