EQ Tips (I know I know, there's no perfect solution) for a guy with Tinnitus

My best advice is stop right now and take a rest. Put it off a week and more if it feels right. Don't mix when you are not at your best. Unless you have a commercial deadline there is no reason to rush it.

It seems by your description that you are nearly done anyway so a little time taken off wont hurt anything.   

I think John is probably right, good to take a break..
A friend of me managed years ago to get nearly rid of the tinitus
by doing autogenic training 1 hour per day, but this is sure no news for you?

Here is some mixing tips from a mix expert!

Do you want vocals to be in your mix at the end of the day? If so pull all the instruments down and start with the vocal sound. 

Tip: If you want to create a mix that has instruments and vocals the mistake many make is getting all the instruments happening and then at the end bring the vocals in.

Start with the vocals. The vocal sound is much easier to get right when you are only hearing them. They will be easier to EQ. The vocal reverb will be easier to setup too. Any tinnitus issues will be easier to handle because you are only dealing with the vocals at this point. Easier for the ear to manage.

Now if you have got some great instrument sounds happening then good. Start bringing them back in. Make sure the vocal stays present and they are the main thing you are hearing. If the instruments don't sound great once you are hearing them and the vocals then alter the instrument sounds to suit and keep the vocal sound intact. Not the other way round. 

Switch to a small mono speaker at low volume to fine tune the balance between vocals and instruments. You will end up with a fine mix at the end of the day.

If there are vocals present they reign supreme. This approach does depend on a stellar vocal performances though. 

I do my best mixes when I (make a copy and) pull everything down to the bottom and do the mix over. This includes FX.
It seems hard to consider after taking all that time to get it right, but it goes so much faster the second and third time around.
And faster also seems to make it better. There is a confidence factor that seems to help.
As per posts above, I like to start with just the most important elements, usually vox and low frequencies rhythms (kick and bass) and fit the rest under quickly.

Great info from all, thank you. Yes I have true tinnitus, and yes I'm only running one eq at a time (not compounding).
The two biggest things (other than jacked-up ears) are that I'm a guitarist by nature and suffer from hate-my-own-recorded-voice-itus. Only doing it all myself because my partner in crime is too busy raising three kids and maintaining a house, if I can't get him to sing then hopefully I can borrow his ears long enough to get an objective opinion.  Figures I wouldn't be this motivated to do all the work to make music until after my ear went to hell.
Thanks again, I'll rest when I die :) (okay not really but I've got to at least finish this one song soon or I'm going to go crazy)