Max cruise thrust is not shown on E/WD. Only max climb. Max cruise is 2.4% less N1, if I recall correctly.
Max level may be limited by max cruise thrust.
The ND energy circle is something you can calculate on your own, but it is very useful. It represents the distance you need to land, taking into account your altitude, speed and airport elevation.
For instance, if you are flying vectors you are in HDG mode. Still, you have distance to go in the MCDU FPLN page, provided you wisely sequence the waypoints. If that distance is less than the distance of your energy circle, then you are high, if it is more, then you are low.