Are They Light Tanks? or Are They Bunkers?

The Chimera. I used to be a fan. And still am, just that I use them vastly different. Whereas I used to rush them up, and rely on outmaneuvering my opponent... but that absolutely didn't work, as Guard just aren't able to go one on one. So here's the new way of using them. When I take them, I use two or three, and just sit them still. I take bare bones here, multilaser and heavy bolters. They are ingrained in my defenses, so thick that cover saves are without question mandatory. If it blows up, I put it in a spot where my guys could possibly get a cover save. Anywho, just keep em parked. Occasionally I may put a unit in them, heavy weapons teams allow all the heavy weapons to fire from within, with no aspect of losing my men in one explosion, keep in mind, heavy weapons teams are one model each with two wounds, impossible to lose any from the explosion. But I'll only squeak them in if the enemy rolls up with any heavy anti infantry.

After the battles halfway through, I'll pile a unit in, and gun it. All my chimeras with some form of troop choice in them, and make a dash to claim objectives.

I try not to rely on this, as they usually blow turn two. But sometimes you'll get lucky. Either way you're bound to get your points worth out of these puppies, so yeah.