First of all, thank you for these kind words, it means the reward I get behind the hard work put behind this and it's a pleasure to help this community!
For the XWAK method, look at the left bottom of the Maciasl app, you will see a search box called filter tree. This is the device search box, type XWAK there and it should get you to the XWAX section. Then just add the "Return (0)" line as showed in the guide.
.dsl and .aml are two different things. .dsl is the disassembled version of the file, whereas .aml is the final product that you're going to use. This means that any edits that you're going to do must be in the .dsl version. When you finish to edit the .dsl version you save it and save an .aml one as well. For example DSDT.dsl and DSDT.aml. Only the .aml version goes in Clover's EFI partition.
There are no simple steps to make FaceTime and iMessage work. The process requires a lot of attention. I have already provided a link in the guide to get them working. The link is
http://www.tonymacx86.com/threads/how-to-fix-imessage.110471/ do read it very carefully, it's very important to allocate a lot of amount time for this chapter and understand it well. This is of no jokes here, it's very serious, I can even say the most serious one! Keep in mind that we are dealing with Apple's servers here and if they sense that something is fishy on the other end, they will block your account. And to sort the issue, I know the proceedings here and believe me you don't want to go through that!! For example; I can see in your provided config.plist, iin the SMBIOS parameters, your Serial Number begins with "C0" and this is ultimately wrong! A MacPro 6,1 (2013) cannot have a serial number that begins with "C0" because "C0" serials are for products that are manufactured in Ireland, if my memory is good. As we all know the MacPro 6,1 is manufactured in the U.S itself, in Texas. Therefore, when you will try to login in your iMessage the servers will detect something is wrong here as the serial number does not reflect the machine and due to the severe measures to fight against piracy, Apple will block your account on these services immediately. Don't rely on the serial number that the app generated for you, do your own researches. Trust me, go read that guide carefully.
Yes the AppleGraphicsDevicePolicy.kext method will work nearly same as the dsdt method but I do recommend only the DSDT method as it remains persistent even after updates whereas editing AppleGraphicsDevicePolicy.kext does not stay after updates.
Yes, SSDT is a must!
iMessage and FaceTime works with MacPro 6,1. But before changing SMBIOS model, logout of these services first.
HWMonitor works fine on my end and should on your's as well. Get your DSDT and SSDTs work fine before.
I don't know if the apple magic trackpad, I don't own one. But I think it should work, I don't see any reasons why it wouldn't.
AirDrop is not that steady and constant. Sometimes it takes much time (more than 30 seconds) to find the nearby devices. Don't worry this issue is normal, even for real Mac users. Don't forget so set your AirDrop to be discovered by "Everyone" though!!