Okay dude, I have used Krow as a lead and while it does work pretty well, Butters is right. Whether he has used Honchkrow or not has no bearing on how it handles opposing leads, because calculations > 'experience'. He wasn't bagging you out, he was helping you - if you can't take constructive criticism, then don't post a RMT (and don't read the rest of my post...) because you don't make RMT's so that people can praise you on your wonderfully-unique team, you make them to actually use the advice you receive.
Well now that that's out of the way, here comes the rate! Since you seem pretty unlikely to consider replacing Honchkrow, I'll just leave that as it is, and it's a pretty good lead anyway.
Now, you say Machamp keeps Mence under control, but consider this: Mence has plenty of opportunities to come in to play, right? Against Scarfed Machamp's Fire Punch, against Scarftran's Fire Blast or Earth Power, and Honchkrow isn't going to be able to stop Mence (although Sucker Punch will cripple it severely). From there, MixMence will shit all over your team with the appropriate move and DDmence will Dragon Dance and if Donphan's out of commission, it's pretty much GG. Anyway I'm going off on a tangent, but basically you aren't as well prepared for Mence as you think.
Okay so since Heatran is a better scarfer than Machamp, I suggest that you change Machamp's set to a RestTalk set that will give you something to take Sleep, since nobody likes immediately having a 5-6 disadvantage courtesy of a Roserade or Breloom.
Machamp@Leftovers
Adamant
EVs: 252 HP / 252 Atk / 4 Spe
No Guard
-Rest
-Sleep Talk
-Dynamicpunch
-Payback/Ice Punch
Mmkay so Rest and Sleep Talk explain themselves, Dynamicpunch works wonderfully with Sleep Talk (it negates DPunch's low PP) and the last two moves are down to preference. Payback is the obvious one, preventing Ghosts from walling you all day. but since you really don't want Mence setting up, Ice Punch might also be a good choice. You could also use Stone Edge but I think it is a lesser option.
Alrighty leave Heatran as it is, Donphan is great for keeping Mence in check. However with Rotom I strongly suggest Thunderbolt over Shadow Ball since Electric is actually resisted by fewer types than Ghost. Thunderbolt also has higher base power so that's a plus. It also has superior super-effective coverage. By the way Rotom-w is in no way, shape or form a Gengar counter: a counter is supposed to be able to switch in with impunity multiple times. Rotom cannot switch into Gengar with impunity (meaning, on any of it's attacks [in this context]) so yeah, just a heads up. On that note Gengar is a problem for your team, with Honchkrow and Heatran being the only Pokemon who can stop it so far.
With that in mind here's my final suggestion (which you are definitely going to hate): Zapdos over Articuno. While you do have a Spinner, remember that you won't always be able to Spin Rocks away, and under those circumstances you're pretty much screwed with Articuno. Zapdos handles Rocks much better, and helps with your Gengar weakness, since Articuno dies to Tbolt from Gengar. Also, Zapdos keeps Scizor in check. You can still use Toxic SubRoost, but I feel Zapdos is a better choice.
As for Articuno's unpredictability, it's actually not hard to predict that it's going to use an Ice attack and if SR is up then unpredictability won't mattter. I seriously doubt that a team would be unprepared for it too, since a simple Steel-type (which are everywhere in the Dragon-centric metagame) will completely wall Cuno.
Good luck with your team, and please at least try my suggestions, even if you don't make them permanent.
EDIT: Why are you so keen on a physical revenge killer? Heatran revenges Pokes just fine... Oh and I changed my mind; I now suggest Scarf Starmie over Heatran since it actually can revenge kill Salamence. With TTar, it doesn't necessarily wall Starmie, since Hydro Pump 2HKOs IIRC. Unfortunately TTar is an issue for Starmie, but you also use Rotom who has TTar issues, so you shouldn't be worried about using Starmie. It also still resists Fire AND Water, so it's a win-win situation.