It's a hopeless cause. It is like saying you can take on a tank with a machine gun, because you have such a high ROF, and even without armor, you are so much more mobile and agile than the tank.
In real war, true enough just "troops" could take out a tank, if they had the STEALTH and KILLING power to get the job done. Sticky Bombs, magnetic mines, Molotov Cocktails, Flamethrowers, PIATS, Bazookas, Panzerfaust, Cyanide / Poison Grenades, some of them quite deadly for the tank or the tank CREW, but some of the options a guaranteed suicide run for the trooper.
The B2 wasn't used by the Germans in real life as a frontline tank, it was used against captive people, resistance forces not armed like true frontline troops, or weaker tanked or tankless, no artillery enemy forces.
I've tried this first hand, even if you shoot nothing but gold rounds from the B2 at the Mat BP, you will lose your @$$ in credits and W/R, in all but the most lucky of circumstances. Without Arty support, or Blitz bringing in Engineer or Storm Troopers armed with special anti tank weapons, Blitz battles with many of the lower tiers tanks or the PZ B2 will not end well.
The Pz B2 could barely hold it's own against a Hetzer, M3 Lee, DW2, or the Valentine, with just AP, or a little better with a mix of AP and APCR, and that is fighting one of those at a time, but in a combo of the aforementioned, you alone without help are soon a dead duck. Now with the Mat BP in the mix of the above, it may actually be cheaper to just take the loss and go AFK, without wasting credits shooting basically "blanks" of any extra cost rounds in a vain effort.