First off, thanks for all the replies, I'll be playing around with it more in 3s and 4s and lots of the tips will be helpful.
I have actually been playing around this doctrine a bit myself. Here is what I have been doing.
1. I go for straight for anvil. As stated above airburst shells with coordinated fire are very powerful.
2. Do not even go for a Sexton or for weapon racks. You can simple use your munitions instead for artillery. Infantry Sections with five man squads are quite strong anyways that you do not really need weapon racks.
3. Sniper can quite useful. Not only it can apply bleed, it can throw the flares out instead of infantry sections. This can help keep your infantry sections alive since you can get more medics out. Also, this can help vs elite infantry with out the need of weapon racks.
4. Churchills are much better that people give them credit. They have excellent anti infantry, and are tanky enough that you do not really need to fear panthers or tigers. However, they will need support from AT guns. The 17 pounder can actually really help with. Though they are expensive in population, 20. But seeing you are not actually not building sextons this can be fine.
I hope this helps.
1. A given.
2. Not even weapon racks? Interesting. It is a huge muni drain, but can IS actually hold the lines against more numerous AND superior forces that way? (I usually only build two and supplement with pit+bofors or sniper+aec). I'm just wondering.
3. I would build snipers, but I need to find somewhere to fit it into my build with this commander, which is vickers, 2nd IS, tech up, 2x REs, pit, bofors, at gun, tech anvil. Any suggestions?
4. It does seem that other players think that the churchill is a huge vet vending machine, and I really hate using the 17pdr, but I would definitely consider them options.
On another note, I have used the sexton in a couple of 4s that got really arty-spammy and they seemed to do an OK job paired with the valentine map hack but that meant I had to rely on my teammates for any real AT (beyond 6pdr spam and a cromwell), but it wasn't awful. Anyone else had similar experiences? Or was I just playing shitty opponents?