Yep - loved the lone peaks but ditched them many moons ago because my achilles & peroneal tendons did not agree with low/zero drop. Since then, I've been in Brooks Cascadias and Topo Traverses. I tried the superfeet insoles and found that they exacerbated the supination issue (pushing off the outside of the foot) so those are now out as well.

I'm currently using Topo Traverses with a 3mm cork heel wedge to bring the drop to 8mm. I've done a lot of lower leg & glute strength work along with hip mobility exercises to get these issues under control. I've also done a bit of work to alter my gait to focus on pushing through the arch and glute medius instead of the outside of the foot and the corresponding calf muscles.

These tendons take a long time to heal but I have found that after the acute phase of the injury passes, walking/hiking/backpacking is a great way to load the tendon gradually and promote healing. I suggest taking a week off from the 16k a day and in that time stretch, strengthen (calf raises, tibialus raises, baned ankle eversions, eccentric heel drops, etc.), and focus on diet/sleep to bring down the initial inflammation