alright
you have a good idea of what a good song has. A lot of echo and tricks used with it. First things first, for the beginning of the song, it came off a little loud. For at least the first couple of hits you may want to slap a filter on it, would really help.
Also the delay you have going off your first 2 instruments, there should be an option to reduce the volume of the initial echo by a certain amount, I recommend you use this. I know you wont want to, but it helps distinguish the beat a little more, and if you want it to last as long, just reduce the decay a little bit.
I notice yes, a lot of delay, but not much reverb, with a song like this, you will want a reverb. Reverb will fill in those empty spaces in the song, and just make it feel that much more fill. Lead instruments will want about 6 ms of reverb, low and high shelf reduced a bit. The more background instruments probably want 1.5 seconds or so of reverb, and have a lot of low, or high, depending on what the song needs at the time.
I really like the high BP'ed echo on that one instrument, I'm guessing its a preset installed into the instrument, i don't care, its awesome.
Your drums are fine for now, very minimalistic, and fits the song perfectly. your high hat seems very out of place in parts, sometimes you need to EQ the shit outta that bastard to get him out of the way, and usually chorus/flanger/phaser it back a bit, adds a nice bit of LFO diversity if you do the latter.
finally, the Slayer. Please don't.
Use one of the string samples, or even the Sytrus, and add some distortion to it.
You will want to DL some different distortion VST's and try em out, one of the keys in your distortion is to not actually distort it too much, just enough to make it sound like a guitar.
i suggest tubeBaby for high high guitars, fuzz plus for pretty much anything.
also, fade outs are cheesy and from the 80's, don't do it, its a trap.
Oh, and thanks for that review you gave me. Probably the most useful review I have ever gotten.