I don't like the mid length style boards for a wing board in breaking ocean waves, it seems like it's not much to choose from for a pure wakeboard, most brands focus on mid length / parawing boards. Any recommendation for a pure wing wave board? think a bit pointy nose, around 23 wide and max 5.4 long and under 5kg around 75 - 85 l, maybe a bit narrow tail or is it just to go custom for a pure wing wave board ? Any recommendations? I should say the it's always plenty of wind (3m-3.5m wing) when the waves are on so no need for long narrow board to get up on foil.

A 70 litres KT Drifter 5 Pro Carbon is pretty close to what you are describing. Give it a try and see if you can find anything that you don't like.

ktfoiling.com/boards/drifter-5-pro-carbon/

appletree slice v4
appletreesurfboards.com/product/appleslice-v4-wing-foil-board/?
AFS Fire V2 with 5.2x23.5x80 ?
afs-foiling.com/product/fire-v2

Gong also make a lot of different wave dedicated boards with the specs/description of what you like.
Cruzader point and Lethal pro for example,
www.gong-galaxy.com/en/collections/wing-foil-boards-waveriding

or indeed go custom if you really know what you want.
I had with windsurf and sup plenty of customs but necer felt the need with wingboards as I really like the midlengths.

The new 26 fone rocket wing s is designed for waves (i have the older model) but i think longer than you prefer. I might buy the 70 thats 5'8 i recall