I disagree with burning the points and keep certion amount in the account !!
you should use them the correct way 5 nights in expensive hotels, if the hotel sell the room for 280 or less i well pay more than that i well use the points if my stay 5 nights or more (this is my strategy most of the time)
Also you can use them for 7 nights plus air miles here is the link https://www.marriott.com/loyalty/redeem/travel/packages.mi

​​​​​​Im sitting on 1,600.000 points today just use 240k in London save me something around $2500 for 5 nights..
if you have 2M try to keep your account with 700k all the time..!