Cyclone is weird. I wanted to make a new char based on it but I don't like it. I didn't expect D3 WW cause I knew that was unlikely to happen, so really I expected something close to D2 WW. The issue is unlike D2 WW, the aoe is smaller and/or the min distance is bigger in PoE, so you basically cannot chain whirlwind a mob and hit it non stop. You can't triangle it either. It just moves too far, so you spend 25-40% of your time out of range of your intended target spinning in the wind for nothing. You can slow your movement speed like Kripp was trying to do(he had -14% speed) but all that does is once you're out of range of the mob you still move slow as shit and take forever to finish your current spin, and you can't use your spin to move to the next mobs, so it's not really that great either unless you can 100% kill mobs during the first spin.
Damage wise, it's alright. The tooltip DPS is as usual bugged and basically display half the DPS cause it only account for a single hit or something when it should count 2. Even at 2 however the damage isn't exceptional. The only interesting point is the fact you attack twice as fast as your attack speed, which is interesting for procs mostly since everything else is also cut by half in efficiency so that part doesn't matter. Procs are mostly blind, can't use kb as it'll fuck your damage big time, chance to flee the same. Other procs are chance on hit to cause status ailments. I think this is the big thing and the only point where it might be interesting. While 35% efficiency is very low, because it's an attack and with the proper gear, auras and passives, you should be able to proc shocks even on non crits. That's ebcause unlike spells, you can get a very large amount of lightning dmg on items(wake of destruction boots, rings/gloves with 50ish lightning dmg, weapon with 70ish dmg), wrath aura possibly with inner force and then add weapon elemental damage+catalyse to buff that shit up big time. Also Added Lightning for the quality bonus. Once you reach the correct amount to shock, Cyclone will tear mobs apart due to the retarded attack speed(and the fact you're stacking attack speed too). Then add Prolif to it and everything is shocked and dies instantly. Can do a crit variant with dagger build and shadow 30% lightning dmg but I don't know if it's viable hp wise would need to check it out. Can also add tempest shield+added lightning+prolif and rely on a high block shield and possibly on block talents.
The biggest issue is you can do more or less that same shit with Cleave, and Cleave is better if you use dual wield, by like a very large margin. It has large aoe(granted it's only in front but the base is larger so aoe passives are also larger), it does a fuckton more damage, it doesn't move you around. You could if you wanted use a prolif/lightning based ele cleave just the same too, and while cleave attacks quite a lot slower even with DW, it also hits that much harder so you don't have to go too high on lightning dmg to actually proc shocks(both hands benefit each from your lightning dmg, then all that damage is added in one single hit so cleave will often hit as hard as a spell with the proper elemental buffs and conc effect). If you could dagger cleave or claw cleave I think no one would bother using this. For other weapon types I don't think you should bother cycloning instead of cleaving, not with the current values.
Finally as physical, it seems to be absolutely awful and I don't really see a point of going phys with it. It does get 4% phys per point but that's like a lot of other melee skills, and besides stacking life leech there isn't much of a point and I don't quite see why you'd be doing that over killing stuff faster. I guess maybe in a super high health high lifeleech high liferegen build with good chaos resist so you can run blood rage. You'd be tankier than an ele cyclone, but you'd kill a lot slower most likely especially since armor on mobs would reduce more dmg on cyclone than other attacks(2small hits vs 1big hits is always worth in physical).