Determine how much income you will need for your anticipated life style. Evaluate taxes, estate plan and survivor needs. CREF offers full cashout capability at any amount you wish. Large cashouts are not the usual procedure due to tax consequences. Tax penalties could apply.
Rollovers are available.
TIAA offers interest-only payments. Available from CREF funds, you just take out whatever you want, whenever you want. This reduces the amount available for an annuity. This pays the most money but is only a pension for you. A COLA option is offered but rarely taken.