A good rule of thumb will be to add roughly 20 Megabytes per Plug-In to the memory allocation of DAE. Please note that some HTDM Plug-Ins also require more memory in Pro Tools, so it might be a good idea to allocate significantly more memory to Pro Tools also. Running several Plug-Ins simultaneously might require as much as 200 Megabytes for DAE and Pro Tools or even more!