Firstly, I'm a self classified sprinter, so take whatever I write with a grain of salt, but I've been around the game for long enough now to know a few things.
On the surface, your Monday ride seems like a tempo style effort. Is it on relatively flat ground? Also from what you've posted I'll assume that enduro style races are what you're aiming at.
Intensity is what you want IMO. Solid 45-60min crit style race intensity and the corresponding strength and fitness are what you want if you're aiming to be at the top in track enduro. I watched a friend train for worlds last year. He was absolutely smashing his goals. Strong as hell on a 45min road TT and our club races of up to 45km, but when it came to the track scratch/points/ITT, he was left eating dust. Sure he was strong, but these track events are a different beast at the higher levels and hitting hard and bouncing back to hit hard again and again are what it takes, and you need to train for that. What exactly that involves I can't actually answer, but I'm going to have a crack and say shorter intervals at high intensity with reduced rest once the season draws near. Leading up to that time, just getting fit enough to handle the workouts is what you want, with what you're doing even may be enough for now.
I finally made my ascension into club A-grade and open event B-grade when I was out on the road working my way up to hanging with the fast guys on their early morning bunch ride. There was no holding back on the tempo to keep it together, it was hold on or see you back at the coffee shop. I was my fittest when I became able to consistently hold on for the sprint to the city limits