User blog comment:Chezxero/Rex, the Defender of Noxus/@comment-7481207-20130705161524

His assault mode is far too weak. Compare to Tristana's and Udyr's attack speed steroids:

Tristana's increases it by 90% and lasts only 3 seconds longer with the same cooldown, but has no drawback.

Udyr's increases it by 70% for half the duration but also less than a third of the cooldown, and gets a damage over time effect on his first attack as well.

While the 100 extra range is nice when added to his already high base range, the loss of 10% attack damage is way too much to be worth it.