1 question, is this VCS or SFW HA? I'll assume you are using SFWHA. (Using our volume manager + VCS)
>> "Now since the luns are shared and they have to be under some multipathing software,"
This in incorrect. Multipathing solution for disks such as DMP is only needed if each VM sees two or more separate paths to the same lun/harddisk.
Simply put, if you presented only 10 harddisks to 1 VM and that VM sees only 10 harddisks in VEA without having DMP, you do not need a multipathing solution,
If they are just virtual harddisks with a virtual scsi adaptor set to "Virtual" for the harddisks, then usually, this is only 1 path.
So you would not need to install any multipathing solution such as VxDMS if this is how you set it up in ESX.
Other than this, it's same on ESX as physical servers for creating a VCS environment.