Wow, 2-hour strength sessions would be a lot...unless it's just like once per week? If multiple times per week, that seems like a lot along with running. I used to be very big on strength training (before I started running, and I still do it a lot), and even then, I would be maxing out at about 90 minutes because I would be gassed. (This was back in the era I was doing things like P90X, etc., so pretty serious stuff.)
If you're looking to up your "intensity" in the strength workouts, you could think about trying to increase your weights for specific exercises and not necessarily your volume/time. I think quality over quantity here.
Another way to change things up to challenge your body is to change the reps versus sets. For example, doing things 2 x 15 with a lighter weight will work you differently than something like 4 x 6 with a heavier weight for the same exercise. But you don't necessarily have to take more time.