Considering that creating this thread was considered to be "Tinker spamming" among some detractors, I'm going to have to pass.
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The pet doesn't die. Damage the pet endures is transferred to the PC. In the OP I listed multiple ways the pet and the tank can move.
Which is a discussion that I welcome.IF that is the thing - then I can imagine some really cheezy stuff. Even so - this is still a question about not the class - but to change the blueprint of encounters.