hi sonny
i've been through the wringer snapping and caving in all sorts of kite brand specific (and custom) surf boards, of most construction types over the years. there really is no silver bullet.
now are you talking about strapless boosting, or chucking straps on and letting rip?
north boards can be ok for strapped style of riding, but it really only takes one hottish landing from a big boost eg. half into a trough or crest in chop, to render any construction type fallible. specially if you have heavy feet like myself. ive snapped just as many doing 1-1.5m off water strapless punts and coming down a little hot too....
a board you might want to consider is something like the old kipuna (I think the axis new wave is the recent incarnation), that has paulownia rails, pvc core and a recessed deck. there are some forum users that have been riding them for years and swear on the durability - but I couldn't say first hand. pvc hasn't been particularly kind to me over the years.
a mutant TT might get you the durability with boosting strapped in the conditions that you described - might need to demo though as mutants are super rider preference...but the positive will be you'll also finally have a tt for flat water riding (just adjust fins) and you'll learn how to jump probably more efficiently.
neither of these ride how I like on waves, but that might not be your requirement anyhow - so continue to think about it and demo if possible.
my 2 cents though: if I were you I would chuck the straps on the 2nd hand wam and ride it til you kill it, whilst also saving money for that next "silver bullet" and demo'ing as much as possible in the meantime