Kivan - Worth making use of the two weapon style points by placing 2 points in a sword skill?

Hey guy's I'm just levelling Kivan up to level 2. Now I am unable to place points any further into Longbow of course as he comes with 2 already. My question simply is; Is it worth specializing in a sword skill e.g. long or wazikashi as a synergy for the two points in two weapon style fighting or should i pump the points in to crossbow just in case i get a nice crossbow drop upgrade?

I'm inclined to go the CrossBow route but am just looking for thoughts and alternatives; thanks.