Hi,
The general idea about his commander is that you focus on a very classic ostheer gameplan but you will have less but better units.
The commander is based on quick high-impact.
The 1st ability, "training troops" jump the veterancy of a unit to a high level... but for a price. The fuel cost make this ability usable twice a game but rarely more.
So you have to choose of what unit you want to raise XP
Check this
http://www.coh2.org/guides/29892/the-company-of-heroes-2-veterancy-guide
And choose wisely what unit deserves veterancy.
Dont forget one thing : the xp given is a fixed number, but the xp necessary to level up differ for each unit.
For exemple, Gren, MG42, mortar get 3 stars immediately.
Snipers get only one, P4 get 0.98% of a star, PG get 1 or 2 stars (cant remember).
Basically, the more powerful a unit is, the less star you get.
For my part i like to vetup at least a MG42, it is always useful. For the rest, be adaptative, there is no nobrainer.
Also, remember that a vet3 unit get no xp, so all xp made by killing with theses units is lost.
About upgrades :
the commander gives you stun grenades, smoke on vehicles and G43 rifles. All are very good upgrades you should use, smoke is a prized tool and the G43 allow you to specialise gren in closecombat.
Remember one thing about this commander : he has NO off map ability.
This mean two things : you have to rely on the basic rooster of the OST to clean entranched position, no bombarding AND you dont have a way to spend munition other than spamming upgrades, grenades and bunker utility.
Then the tiger.
You can see rivers of tears about the Ace in the forum and many many many rage (i am sure somebody will make a whine-post in this thread). He is even banned in some tournaments.
This bring a Vet3 tiger on the field for 800 MP and 0 fuel (quite a bargain) but cost you all your futur ressources (until the tank is destroyed) not that cheap after all. You can bring only one each game, once destroyed, forever destroyed.
Basically this is the ultimate unit, he is both Anti-tank and Anti-Infantery and does both well at a very long range. he is fast bery well armored have a bunch of life. the only weakness of the unit lies in his cost (your ressources cut).
How to use it? your main goal once it is out is to shut down the AT units of the ennemy, once it is done, simply attack everything and push the ennemy)
The main goal of the ennemy is to dammage it to either kill it (beware of mines) or forces you to retreat to repair (which takes a very long time, putting you in the difficult situation where your best unit is unusable and eat all your ressources. The later the worst.
Overall it is a very good commander that adapt to a lot of situation.