Chronosculpt is more of an animation cache offset tweaker than a sculpt tool for modeling. Haven't use it cause there is no demo yet, but you won't find the sculpt toolset and workflows present in sculpt apps.
Well, I think you can't go wrong with ZBrush, though it can be expensive depending on the budget, 3D-Coat not as nice as ZB for sculpting but still can pull out a lot.
There is also Mudbox and Mari, but those start to go quite a bit in price.
Mudbox works with any software that'll IO accessible formats to/from it, which includes LW. It is by no means an AD-only product.
3D-Coat is as viable an option for LW as ZBrush, more so in some ways, as they've closely supported LW longer.
That said, I'm with Areyos, this type of relief work is much, much better done with normal or displacement mapping. Buying (and learning) a sculpting app just for this task would be a waste of time and effort.
for relief bump mapping something complex, the "fastest higher quality" way is to use something like crazy bump or bitmap2material to create a displacement or normal map. . .not to use a sculpting application.