91' Hallmark Bed Sag Fix

I removed the 1/8" luan top piece of my bed area expecting to find severe dry rot causing the center of the bed to sag on my recently purchased 91' Hallmark Cuchara.

I was surprised to see no wood rot but the sagging center supports were only 1x2's over a span of 54" with 24" between each board.

I have a Kreg Jig system so I can easily glue & screw new supports like what is there but would expect them to eventually sag again.

- I could epoxy & screw some 3/4 x 1 x 1/8 aluminum angle along the 2 center boards reducing the chance of sag

or

- Put more center boards in, maybe 4?

or

- Install 2x2's in the center & add another 1x2 on the edge boards to match center boards height

What makes sense and will best minimize sag?

I'm 205 and would be the primary user with my wife joining me occasionally.