I am thinking out loud here; for advice

A
With 750k MQM lifetime - 150k MQM and DM - is it worth 250k MQM run?
Cost 570k $ on taxes = >$11k lost cash not worth it - certain !

B
Rollover 25k MQM on Jan 2024 -
But a 75k MQM run for 1 yr more of DM may be well worth it ?
Cost now 150k spend = DM for 1 yr in 2025-26
in future that spend will give 1 yr PM if done in 2024 or 2 yrs of PM if done in 2025

C
The kicker is the MQD boost from cards
1 Plat + 1 Reserve= 5k MQD for 800$
T&C states only 1 boost per card type - so not clear if Plat+ Reserve are counted as types or Personal & business for same card counted as same type
e.g., if you have Delta Platinum, can you have DL Business Platinum and count as 2 cards for 5k boost??
If 5k boost easy, then only 230k spend in 2026 Jan will give 2 yrs of DM= 120k spend / yr of DM
If 10k boost for 1600, then only 180k spend needed for DM for 2 yrs