Warboss is designed for CC.
Pk is standard with an attack squig but in a pinch he gets the big choppa.
Ranged weapons for the warboss they make such things? I don't bother with any kind of ranged weapons on the boss since his speciality is CC.
True, but think of it this way:
having a ranged weapon does absolutely nothing to hurt his CC ability. Neither Big Choppa or PK give bonus attacks for having a pistol, so there's absolutely no CC down side to having a shoota, the only issue is points cost.
Now, consider what a shoota (especially a kombi-scorcha) can *add* to CC
I always think of shooting before assaulting like having a bonus attack that strikes at I0. The more shots you can get off before your charge is the more damage you can do without them being able to retaliate...and with low orky initiative (or a PK dragging you down) being able to draw first blood is important for orks.
While the warboss isn't GOOD at shooting, his shooting doesn't HURT his assault at all. He has no access to Heavy or RF weapons, so shooting can only bolster his assault.
Now, what's the premier shooting weapon to give to an assault based unit? Flamers. Assault units love flamers. They're short ranged, and they can do a ton of damage before your guys even get into the mix.
So why on earth would you not buy a 5 point one-shot Heavy Flamer that doubles as an unlimited Assault 2 weapon? If you have the points, there's no reason not to get it. It only serves to bolster the assault capability of the warboss.
As for other equipment, I try not to load up too much. It you use him to hunt troops and break vehicles, givw him 'eavy armor. If you plan on putting him toe to toe with walkers and ICs, then you should take a cybork body to give him half a chance...but the warboss probably souldn;t be used against ICs because he;ll get cut down before he can swing.