Jailer of Fortitude soloable? please include strats if it is :)
Yes, but it's slow and you may end up using lots of biscuits.
Firstly note that you will want some form of elemental WS to perform, I used Aeolian Edge (dagger).
BST/DNC with an evasion/haste build to start using PDT- axes for pet. Pop Fort and set pet on him (I recommend Falcorr to make this faster) and begin slashing at the Ghrah pets. Take note that the enmity of these pets seems dependent on the form; If I recall, ball form will assist the Jailer, Spider form will attack you (may have been the other way around). They went down fairly quickly with little trouble, but using curing waltz will incurr the Jailer's attention because of the minimal damage output from the pet. Simply snarl and use Waltz in moderation, take some meds if you're unsure.
After the ads are dead, swap in your dagger ensue to melee the Jailer with your pet. Use Aeolian Edge whenever you can and Snarl immediately after. When the pet has TP, use Choke Breath which will usually do around 150-400 damage. Because of the need to reward fairly often, this can take a while (usually around 30-40 minutes).
I'm not sure what to compare this to. Perhaps other pets might warrant a greater WS arsenal with which to do elemental damage, but this Jailer still hits pretty hard so an evasive pet is handy.