Random bot play so IMPs, unfavourable.
GIB doesn't adjust for vulnerability when preempting so you know it has the ♦A and a major card or more.
I was planning to post this hand in GIB robot discussion to complain about the bidding system, where X is takeout, 4♦ and 5♦ show two-suited hands with 4 and 3- losers respectively, 3NT is capped at 22 HCP and 4NT is undefined, but then I realized my own system has no real answer here, either.
So, what do you do with this hand? I realize you normally don't tailor your system to these extreme situations, I just wonder which general agreements might work here.
As a bonus question, what if you also held the ♠A? Do you just blast 6NT and hope for a dummy entry or a diamond lead?