Welding Tips and Tricks

first let me say I am a beginner. I was thinking of making some odd shaped "modern" table legs. I will plasma cut 2 symmetric curvy pieces of aluminum and then have 2 long pieces to close the gap on each side. My question is what is the best way to do this. Do I weld supports on the curvy piece and then lay the other curvy piece on top and then do the side pieces? Do I weld the two side pieces to one curvy piece and then weld the second curvy piece? Do people use a buck? Does it matter or am I just way over thinking this. Obviously since it is a piece of furniture I want it to have as symmetric and clean look as possible. thanks and hope this makes since.

So from what I gather, 2 curvy seamed to 2 flat and the flat are at the corner? I would tack each curvy to each flat and then do the flat to flat. Weld the outside of the 90 first. When you do the inside it will want to pull in.

thanks Diesel.