The US Army thinking from Vietnam controlled their requirements for hover and climb for the UTTAS. Specifically, they required, from an HOGE hover at design gross weight, and at 4000'Hp/95F, a vertical climb of 500 ft/min utilizing 95% of rated power.
The JMR conditions I believe are now 6000'/95F, but in any case, if their thinking follows past indications, it will be climb from an HOGE hover, not at forward speed that will be a main requirement.