Guild Wars 2

So, should I just save my skill slot points until then? Are there a certain few that are indispensable no matter what the build? I feel like I am missing something important about GW2 build strategy because I don’t yet comprehend why I should buy slot skills I have no open slots for.

Thanks

I am a level 13 warrior. I have 9 unspent slot skill points and 3 unspent trait points. I guess this will sound dumb, but, I don’t know what to spend them on. Why buy a slot skill if I don’t have a slot to fill, you know?

The only skills I have purchased so far are the bolo thing and the stand up for justice team buff.

I am building a longbow warrior. I have always liked archers but dislike ranger pets, so I’m hoping this can be a fun pve character that could also be decent at pvp and wvw. I also generally carry around a sword/shield.

Any advice of what to spend my points on? Thanks.