If this has been covered elsewhere kindly point me to the info but could any tell me what forces did the jags have protecting their homeworld assets?
This is somewhat of an interesting question. In the novels covering the fall of Huntress, there is a mention that Osis had scraped up everything available to the Jaguars into an ad hoc unit called the "Jaguar's Heart." Years later, 3058U has several mentions of the other Clans picking up quality Smoke Jaguar salvage from other Homeworlds locations, implying there were in fact still other units that didn't go to Huntress. I don't think anyone short of the writers could say with any accuracy how much strength this would have amounted to.
As for the robustness of the Jaguar Touman, it seems to have been substantial, at least initially. Luthien took a heavy toll on the Clan forces that participated, widely believed to have been Smoke Jaguar Alpha, Beta, and Delta Galaxies, and just a few months later two of those Galaxies were considered combat capable to drop on Tukayyid. After Tukayyid, where Beta Galaxy took heavy losses and Alpha mauled, there appears to have been some rapid rebuilding to get Beta back up. For Alpha, the mighty, mighty Jaguar Grenadiers evidently survived in some capacity according to ER3052, and both the 4th and 7th Dragoons who had been part of Alpha were transferred to a seemingly new Galaxy, Epsilon, for the remainder of their existence. It is well noted that the Jaguars from this point had great difficulty rebuilding their forces, with the exact writing being something like "rebuilding one cluster just to see another mauled in a raid." The usage of Inner Sphere equipment is also well known. The concentration of resources to rebuild both Alpha Galaxy at the same time as Tau Galaxy was said to be a massive undertaking by this point in time, making Tau's rapid loss all the more devastating.
As half the leadership of the Crusader cause and one of
the power players in the Homeworlds prior to REVIVAL, the Jaguars appeared to have the same reserves as the other Clans would show, however they went through their reserves far quicker thanks to the twin debacles of Luthien and Tukayyid, and never recovered before the Inner Sphere came looking for their due.