How to use AT guns on the offense?

[Mr Grumpy]

Some players might consider moving other units into the hex to draw def fire before moving the AT gun "gamey", but any unit in T mode is so vulnerable that this maybe the only way.

It is a good idea to entrench, but remember until the unit deploys it gets no benefit from any trench you might prepare for it and as FLG says remember to save a third of the MP's to deploy out of T mode. :)