Just from looking at the the info so far.. I dont think there is much advice that can be given.
I would suggest reading 'Poker Tournament Formular' by Arnold Snyder
Amazon.com: The Poker Tournament Formula: Arnold Snyder: Books
Snyder gives a method of comparing tournamnts to the amount of skill required to win them.
With low, startiing chips, and rapidly rising blinds, the skill level is reduced because a player is not given sufficient room to manuver.
In this tournament you are beginning with 50 BB, but within 3minutes without a doubleup, you are reduced to 25 BB
So you begin mid stacked.. but within 3 minutes you are on the verge of short stacked.
Ill do the maths on it tomorrow if you post the exact blinds, although I would imagine they look something like this
15/30 25/50 50/100 75/150 100/200 200/400 300/600 400/800
To get as far as you are getting is very good.
In the above book, It attempts to estimate the blind level which the final table will occur.. As far as I can see, its a pretty accurate estimate. Thus you can estimate how many chips you will need at that point to not be short stacked.
The only thing I can say is if you look on tournaments like these as lottos, because of the blinds catching you up so quickly, then you can learn to judge the point at which the lotto occurs... so that becomes the level to aim for by using your skill... beond that you have to just accept that you probably will loose but by playing tightly, your chip stack is being rapidly eaten by the blinds.. therefore its more of a mistake to not gamble than it is to gamble. So at that point loosen up considerably and just enjoy the ride!!!
Alternatively look for tournaments with longer blind structures which will allow yo to play skillfully for longer.
As I said check out that book.. It gives an OK stratagy for these types of games.. its not great .. but the analysis of tournament structures is very interesting and not something I have seen written about very often.