Perhaps use zopilcone and mirtazapine, as the mirtazapine helps to keep you asleep. The zopilcone gers you there as stated above
Ive already mentioned Zopiclone here earlier. It's ok at 3.5mg but at 7.5 I'm too groggy the next day. It's a gamble if I can get back to sleep when I wake up in the middle of the night. I have some but hardly use it as its habit forming and can cause rebound insomnea when stopped. I keep it around just in case.
I've tried Mirtazapine and I hate it. I slept but I felt unrested, high, groggy, and tranqed the next morning. Same exact feeling as if I take benadryl, which I also never do for this reason. I still have a bunch of this stuff but I'll never touch it, I should probably toss it.
Hydroxyzine is another one that is prescribed off-label for insomnea but it has a similar effect, and sides for me, to Mirtazipine. It's a bit more tolerable but I'll never use it again. It's an allergy med and wifey has a big jar of it for that purpose, but clearly I'll try anything once.
The best thing I've found for sleep so far that I actually like is Quetiapine. It's an antipsychotic med that is perscribed off-label at a low dose of 25mg to help with insomnea, while a starting dose for it's intended purpose is 100mg+. It has a 20 to 30 min fuse, and when I wake up in the middle of the night to piss or whatever I can fall back asleep easily. Mornings are not too bad, a little groggy but nothing like the other options above, and once I'm up chug some water and eat something I perk up. Big upside is that it's not addictive, therefore not classified as a controlled substance, and rebound insomnea is minimal if you're prone to it, just taper off if needed.