I have a 98 2.5RS (EJ25D) that I've had for a while. The past 18 months its been stored in my garage and not used. It has become more of a fun/project car and I bought a house so it quickly moved to the bottom of the priority list. I finally have had some time to get it going again.

When I put it away it ran perfectly. The battery went bad while it sat, but it was like 7 years old when I put it away. So I bought a new battery and when I when to crank it up. I first disconnected the coil pack and the fuel line before the filter in the engine bay. Routed the fuel line into a cup and cranked the engine over for a while to get oil moving through the engine before actually running it.

I then put everything back together. Then tried to actually start it. Still cranked strong, but never started. I used starting fluid to see if it was a fuel delivery issue even though I had fuel come out before. Didn't start on starting fluid. I checked and found that I wasn't getting spark to the plugs. So I bought a new coil pack, as I have had those die on several other subarus. Still no spark on all cylinders

What should I check next? I couldn't find a diagram online that showed all the parts involved in one diagram.

There are no signs of mice doing any wiring damage that I can see. 

Cam Sensor wiring.  I bet you have eaten wires somewhere.