Roles of Coaching Staff

I have 4 coaches in addition to myself. I also have 2 freshman coaches, but other than pre-season, they are separate from us. I'm the HC and par time QB coach. My QB coach is a volunteer with a demanding job so I only see him twice a week and game nights. So I handle QBs when he's unavailable. I also coach the weak and strong safeties in our 4-2-5 defense. Others: DC-LBs/RBs, JV HC-OL/DL, JV asst.-wR/DBs. The Jv asst. and I split special teams.

I have 9 coaches for 2 levels. We platoon the coaches so the LB coach only coaches the LB's, but at both levels. Makes the coaches get better at their craft and ensures that the same techniques and calls are being made at both levels.

If it was me, and assuming 2 levels, I'd go something like this:
HC - Special teams coordinator, backs & receivers, skill guys
A1 - OC - QB's & maybe backs depending on offense scheme
A2 - DC - LB's
A3 - DL
A4 - DB's
A5 - OL

Each assistant would have special team coaching assignment. HC and either OC or DC stays with varsity level for pregame. Other 4 coach the JV game.

When 1 level is doing defense, the other is doing offense. Works for us.

I am in a very similar type of school with the same staff numbers and players that have to go both ways. Our structure is a follows:

HC-OC/QB on Def. He tends to float a lot this year took care of our SS
2nd Asst-OL Coach#2/DC/DL coach
3rd Asst-OL Coach #1/LB Coach
4th Asst-WR Coach/DB Coach/Handles ST (FS)
5th Asst-RB Coach/DB Coach(Corners)
6th Asst-WR(Slot)/DB Coach (FS)
Voluteer-TE/DE Coach

When we go team we try to divide the staff to coach on both sides of the ball the HC/OL1/3rd and 6th Asst stay Offense
2nd Asst/5th Asst/Volunteer Run Scout Defense

Tabs52 - What are the responsibilities of OL Coach #2. How much time does that take away from your 2nd Assistants role as DC? 

None, practice wise we usually split to work on specifics for the week.  Game plan myself and the HC will work run and pass schemes so he can focus on his defensive responsibilities

At a 2a School In Oklahoma last year we were also very short staffed and made it work going 2 rounds and out.

HC- Offensive Line, Defensive Overseer
OC- QBs, RBs, LBs on defense did scout for defense
DC- Secondary, WR on offense did scout for offense
Assistant 1- RB/DL
Volunteer- Offensive Line
Volunteer- Defensive Line
Volunteer- QB help

This is actually an interesting math problem but it needs constraints. Are there any coaches with experience or specialties?

It really depends on the staff you're looking at. I have always felt that it was prudent for the HC to be a coordinator and to coach the OL and DBs. Those two positions are the most difficult to coach and you need a quality guy there. I also think it's important to have the assistants coach positions other than the ones that they played. This forces them to learn that position which helps them have a better understanding of the schemes, overall. Plus, those guys tend to coach the way they were coached (drills, cue words, etc..) which may not be a good thing. I think it's good to put some pressure on the assistants and have them start from scratch with another position.

I had a former high school/small college QB working with our QBs one year and it didn't work well. It seemed like a good fit at the time but it was clear to me that he hadn't gotten the best coaching when he played. He is a big dude with a strong arm and his high school and college coaches never taught him proper throwing mechanics. He can throw a 10 yard out on a frozen rope using crap form but couldn't understand why a 5'10'', 160lb sophomore QB couldn't do the same thing...He had a bit of an ego too and that made for a few interesting "discussions" in the coaches' office.

There is a good coach Daniel podcast on the 10 roles/types of coaches on staff