I reckon if and when Cook beats Goochy's 333 England should declare. This India team are so rubbish they can be bowled out pretty cheaply. Besides the weather doesn't look that great so no point trying to rack up a huge total.
If Cook gets 333 England are going have somewhere around a 550 run lead - I think that classes as a huge total!
Anyway, if you let him go to 333 you might as well let him try and beat Hutton's 364 but it's academic as you've now put the kiss of death on him.
ps Poor Ravi, if he gets a bat he has nothing to gain and everything to lose.