Thrown at present is effectively a script shared by various auction class items and mutant characters.

Because its main use is with auction class items, tweaking it is problematic.

Consequently, I would relegate the existing mechanics to "old-style" thrown, which those with the relevant items could go on using in the same old way and any thrown mechanics intended to be usable on a general level, I would create new mechanics for.

I would do it with a manoever rather than a weapon skill. Throwing weapons wouldn't be much use without training in the relevant weapon skill, but other items could be thrown for other effects without any training but the CMan. The manoever system is capable of handling special effects far better than the AS/DS crit table system.

Making use of the manoever would normally require purchase of appropriate equipment (bandoliers).

>cman throw set crossb
A scruffy khaki crossbelt containing many well-balanced daggers has been set as your bandolier.

Bandoliers would be refillable at the same sort of shop they are purchased from. You might buy a bandolier of well-balanced daggers in the Landing but in Icemule it would get refilled with finely honed throwing knives.

Messaging would indicate that you put your weapon away, grabbed something from your bandolier, threw it, and unsheathed your weapon, but mechanically you would always have your normal weapon in hand. Similarly, the thrown item wouldn't actually exist and messaging would show it always be lost on use, whether it be to impact damage or disappearing into the environs.

Items intended to create damaging crits would be used from short range while those intended to distract and disable would be used from long range. Stance would indicate the range.

>stance off
>cman throw
Stowing your broadsword of doom, you grab a heavy axe from your frog and run towards the dire orc, pausing at the last moment to hurl the missile
roll result 90
The orc hastily dives sideways as the axe hurtles past and disappears into the environs while you quickly unsheathe your broadsword before it can retaliate.

>stance def
>cman throw
Pausing briefly to secure your claidhmore, you grab a dart from your quiver and launch it towards the sabre-toothed tiger. You have your claidhmore ready for action again before the dart has even reached the tiger
roll result 150
the tip of the dart breaks off and lodges in the tiger's leg causing it some pain and slowing its movements

You could improvise by specifying whatever happened to be in your hand.

>get stone
You pick up a smooth stone.
>cman throw my stone at lich

Heavy items would be capable of damage when thrown at short range and light items of distracting from distance.

...

The effects would be broadly similar to those that can be achieved by other CMans. Used from defense, it would be rather like dirtkick. Used from offense, rather like shield bash or charge. or use a javelin Roman style to get a shield sunder effect. However, you would pay for the ability to use one CMan for multiple purposes by needing equipment with a maintenance cost and it not being quite as good at any of these effects as the less versatile CMans.