I game at 6mm, so a different scale, and the size of my bases probably won't work for 10mm figures. But I too generally game with 1-to-squad unit scales, so perhaps the approach I take will be of some interest. I have settled on a single base size (I use US pennies as my bases), and vary how many figures I put on the base to tell me the unit size.
This is how I organize my basing:
My full strength normal infantry squad is modeled as 4 figures on a base.
This, for example, is a Romanian rifle squad with LMG.
I don't get too fussed about what's on the stand, but in some armies where there might have been squads without LMGs (all rifles), I do try to consistently put LMGs on the stands that should have LMGs.
If it is a "special purpose" squad -- full strength but not a basic infantry squad, then it gets 3 figures on a stand.
Here for example is a Romanian 60mm mortar squad. It may have had as many men as a rifle squad, but it was not a rifle squad. 3 vs. 4 figures allows me to keep track on the game table of non-rifle squads without having to examine the details of the models on the stand (or write tags for them).
It it is a unit that is smaller than a full strength squad, it gets 2 figures on a stand.
Here for example is a tank hunter team. These were small teams organized from within platoons, with demolitions men (in this case carrying a tellermine) and escorts with SMGs.
Again, having 2 men to a stand tells me immediately that this is not a full strength squad. Whether it represents 2 men, or 5 men, is not key to me. In the rules I play (Mein Panzer), full squads can take 2 hits, but half squads can only take 1.
In the case of the Romanians, the 60mm mortar teams were large … 8-10 men. So it gets a 3 man base. In another army light mortars might have been handled by smaller 3-5 man sections. In that case I would model it as a 2 man base. This helps me keep track of which ones are harder to eliminate.
With this approach I get lots of flexibility.
A small flame-thrower team. This can be added to any platoon or assault team.
Here is a battle group HQ. There is a full size HQ command squad, a medical team, and (in the background, hard to see) a commo team with a field telephone.
Here is an Romanian artillery battery equipped with 75mm French guns. Note the 3 figure bases -- full squad strength, but not standard infantry squads. Note the full strength battery HQ, and the half-squad LMG team providing security.
Here is a Romanian battery equipped with 100mm Skoda howitzers. With my battery structure clarified by the 3 man bases, I leave the guns loose. The same set of bases can be used for different gun batteries depending on the scenario. I take the same approach with my AT gun crews. My Romanians, for example, might use 37mm Bofors, 47mm Bohler, or 75mm Pak97/38 guns, depending on the scenario. I only had to build up one set of gun crews to allow all 3 possibilities.
This also gives me the flexibility to account for destroyed guns separately from destroyed gun crews, which may be useful depending on the rules being played.
Took me a while to settle on this approach, but this is how I base all my infantry now.
Here for example is an Italian infantry company. In the case of the Italians, platoons had separate LMG squads and Rifle squads.
-Mark
(aka: Mk 1)