intowin

I've recently found myself often in the following situation in the deepstack live tournament I managed to chip up to 3 times more than average at early stage of the tournament ( usually before the ante kicks in- level 4). Then I start to open up my range a little wider when the ante starts and blinds gets bigger which i thought it is the right strategy, but often i found i lost chips bit by bit especially when most players are 3 times chips less along with a few shorter stacks (less than average) on the table, either i double up the shorter stacks or i lost a big pot to average stacks. no matter what i do it went down the hill i couldn't chip it up again and end up busted before the end of the day. that's exactly what happened to me last week, the fact is if i had walked away from level 4 when i had nearly 100k chips, i would still have more than average chips by the end of the day ( the average chips of day2 was 90k ).Please help me what the right strategy is if you have a big stack at the early stage of the tournament, how to maintain the chip lead, continue playing well without losing chips? 

Your thoughts are much appreciated 

I've recently found myself often in the following situation in the deepstack live tournament I managed to chip up to 3 times more than average at early stage of the tournament ( usually before the ante kicks in- level 4). Then I start to open up my range a little wider when the ante starts and blinds gets bigger which i thought it is the right strategy, but often i found i lost chips bit by bit especially when most players are 3 times chips less along with a few shorter stacks (less than average) on the table, either i double up the shorter stacks or i lost a big pot to average stacks. no matter what i do it went down the hill i couldn't chip it up again and end up busted before the end of the day. that's exactly what happened to me last week, the fact is if i had walked away from level 4 when i had nearly 100k chips, i would still have more than average chips by the end of the day ( the average chips of day2 was 90k ).Please help me what the right strategy is if you have a big stack at the early stage of the tournament, how to maintain the chip lead, continue playing well without losing chips? 
Your thoughts are much appreciated