A damage packet would be good, maybe included with the player information?
There could be, say, 4 packets each with this structure:
0 No Damage
1 Slight Damage
2 Medium Damage
4 Heavy Damage
8 Full damage
Unless you could just give the proper percentage damage, as shown on the F10 page.
This may only be useful to me and maybe the CLC server so I guess it isn't too important.