@Malintex_Terek:
Note: smoke is combustible because it contains particles of burning material. Smoker himself is made of white smoke, which is unusual since smoke usually contains a great deal of carbon. Smoke components include hydrogen, ammonium, and nitrates; ammonium nitrate is extremely combustible, and was used in the Oklahoma City bombings. It also happens to be a white substance.
Royalty > Hero, especially when the royalty is an essential part of Arabastan government. There's no reason Smoker would just let Croc's torture "pass", especially when he sicked his Bananadiles on her. Additionally, there's a whole lot of chaos going down in Arabasta, so it's not like the Rebels, citizens, and Arabastan guard are going to say, "THE MARINES ARE ATTACKING CROCODILE! SCREW THIS CIVIL WAR, LET'S GO KICK THEIR ARSES".
Hey, someone had to convince Hina to let them use their rain making ship thing. Apparently Smoker was the only one who could do it.
I don't know why Smoker left Tashigi to go after either Baroque works or the Shs on her own. Maybe he was trying to let her learn something, it seems that he was pretty confident she wouldn't die despite Crocdile being there.
Does that mean that Smoker didn't find Crocodile to be a serious threat? He seemed so clam in that scene with Hina…
Edit: Actually, why the hell are we comparing Logia user power? We don't know how the fight will do until we know how their elements interact. Maybe Ace can't make fire hot enough to burn smoke, or Aokiji cold enough to effect smoke. Who knows, hell, smoke scientifically shouldn't be able to grab people or be white like that.
Oh yeah, speaking of Logia skills, how about that Smoker and his ability to change the density of his smoke? Now that I think about it, all the logia users are probably equally skilled in their DF use.
Well, science and even psuedo-science aside, I simply don't think Smoker is on the same level as Crocodile. I'll leave the debate of how the fight would go for another day and the particulars of how thier powers would interact, but I simply feel Croc is a higher level of opponent.
Ace is most likely closer to Ako-iji's level. Maybe not as strong, maybe even stronger, depending on how Oda goes with him. He IS Luffy's brother afterall, and he's one of White Beard's finest. That's a meteoric rise to power considering his relatively short time on the grand line. I certainly think he could take out Smoker, once again, setting the science and psuedo science aside for another day. Rather easily actually.
@odlam:
Unlike Croc, Enel, or Ace, Smoker has yet to show me he can produce his power on a grand scale. Croc was whipping up giant violent sandstorms to send out, Enel was creating lightning bombs that could blow up islands, and Ace was destroying entire fleets of ships with his fire. Smoker just doesn't compare.
Well, grandscale destruction doesn't mean victory in a one or one fight. Look at the fighting styles of Mr.2 and Sanji. And what the point of Smoker still chasing the Shs if he's weaker then Crocodile? Smokers probable on par with Aojiki right now, based on what we've seen in their fights so far. I.E both of them are undefeated and have owned the SHs.