It was also viable because, at the time (up to lvl 80), Tornado Kick could put out damage comparable to or better than Asuran Fists. However with the advent of the Razed Ruin atma, both of those got obsoleted by Victory Smite, Ascetic's Fury, and even Backhand Blow.

Since Footwork is more heavily invested in weaponskill damage than standard H2H, yet the only useful weaponskills were vastly inferior to what standard H2H could now achieve, Footwork itself became obsolete except for certain very narrow weaponskill proc setups (fast TP gain, low weaponskill damage so as to not kill the NM).

As for the hit-builds Gokku mentions, standard was 7-hit, and 6-hit was doable as /sam or with Sam Roll (and because of how mnk weaponskills work, that means 4-5 hits needed to reach 100 TP after a weaponskill). Since you generally had a ~75% double-kick rate, that translated to 2-3 rounds between weaponskills.