Starsector 0.97a is out! (02/02/24); New blog post: Planet Search Overhaul (07/13/24)
But you get only small part of both bonuses, not full value.
Interesting and good to know they stack. For those interested the following will plot the combined damage function in wolfram alpha (at half flux for EWM):Plot[Piecewise[{{25, x < 600}, {25*(2.5-x/400), 800 > x > 600},{25*(2.5-x/400)+30*(x/800-1), 1000 > x > 800},{30*(x/800-1), 1600 > x > 100}}], {x, 0, 1600}]