Well there are a lot of ways to approach the problem. I guess that if you were rely looking for a super spar in wood/carbon the best thing would be to opt for a technique that in French are called “bois moule” (sorry for my spelling). You take rely thin strips of wood, almost like shavings and cross laminate them at 45 deg to the length axe of the spar (on a male mold) like when you use BX 45 deg carbon. Like that you have the wood fibres orientated in the most favourable way. On both sides of that some carbon UD and eventually some 0/90 deg cabon (This is only guesswork).
But for my purpose this is too much work.