Let's hear it for geeks!
OP here is something I highly recommend based on it being what I did to my 2005 Enduro. In 2006 the lower models actually came with 32mm forks and 145mm of travel rather than the full 150mm. Spesh couldn't source a good enough 150mm fork at a budget that would allow them to hit the right price point so instead they built it as a shorter travel bike.
The shock dimensions were 8.5" by 2.25" and it resulted in both allowing a shorter and lighter fork being possible (something like a 150mm 32mm fox or RS revelation would work really well) and a lower BB.
I actually retro fitted a spesh sourced shock to turn the bike into this and it was the best thing I ever did to the bike. It turn it into an absolute ripper. Run with a Lyrik coil u-turn set at 150mm (so longer than an equivalent travel 32mm fork) it slackened off the head angle but still kept the BB nice and low. It was unbelievably quick as a trail bike and the loss of 5-8mm of travel was never missed.
You might be able to get someone to build a shock to those dimensions. An 8.5" x 2.5", which is a standard shock, could have the last .25" blocked off and shimmed to suit the bike (you'd want the progression to ramp up sooner to compensate) and that would be awesome.
Really you should look into this. It made a massive difference to the handling and honestly that was the bike that really changed my riding for the better. Riding that for the first time I suddenly clicked on how to corner faster and how to turn the bike with my hips.
As for spring rate/weight TF is geared to your average rider and will come up softer than Mojo, which takes a more DH racers approach to having a harder rate that causes the bike to 'skip' over the tops more. TF adjust for the greater suppleness of the Horst link so the spring rate is harder than for a single pivot.
I think I ran a 500lb on my Enduro when I ran it stock with a dhx5 and I weigh one kilo less than you.