I was watching some casts a week ago, this one particularly
https://www.youtube.com/watch?v=jPTj0G_i8-U and felt in love with dual Stuart build.
I mostly use it with the Pershing Commander and skip T3 (or build it after the Pershing) but it also works with the Tactician commander if you include enough AT stuff in your build.
Dual stuart is tricky. you need to keep your first one alive and use it to harass your opponent as usual. Then you build the second one when you have 70 more fuel. Both have very good DPS vs any target < medium tanks.
Pro:
Low MP cost, doesn't hurt much your MP economy and then if you manage to keep them alive = cost only upkeep.
good DPS vs any soft target, if your opponent doesn't pay attention you can easily wipe squads in really short time.
good survivability if you don't try to dive
Vet1 Vision bonus one 1 Stuart make both of them beast using in pair
Good damage sponge when used in pair, you retreat the targeted/damaged one and can still deal damage
Dual stunshot on medium make them much more deadly that your opponent could think if you support then well with atnade/zooks/atgun
Special Pershing Commander:
When the Pershing hit the field, you are pretty sure to still have one alive and vetted: good vision and stunshot to deal with natural pershing counters: Tigers/Panthers
dual Stuart with rifles and combined arms ability activated is really great to use.
Cons:
Vet0 vision is shit, you need to vet your first stuart and not lose it.
140 fuel investment is huge for 2 units that can't kill medium by their own
Requires a lot of micro to have them survive, you need to know when to go forward, go backward, you can't use them with only attack move, they'll get stuck together in no time making them easy targets.
Stuarts are durable but not that much when mediums hit the field.
So they require even more micro when mediums hit the field.
You're sacrificing early Major/Sherman/Jackson
What are you thought about it? did you try it?