Please add these attributes to ASP.NET MVC:

[AspMvcView]

[AspMvcAction]

[AspMvcController]

That allows to mark custom helpers parameters with these attributes.

JetBrains did that and that looks very helpful:

http://devlicio.us/blogs/hadi_hariri/archive/2011/12/07/providing-intellisense-navigation-and-more-for-custom-helpers-in-asp-net-mvc.aspx

Thanks!