A friend advised me that I should use 35lb line instead to have greater length of line on my reel to control the long run of the fish, What is your opinion? 

I have heard of this theory before...

I have several doubts about it...

Get a bottle of about 2 litres and fill it with water. See how long you can hold it at arms length ! Your arm will start to drop within 30 to 60 seconds. Fish are no different.

It is not the line class that counts, it is your use of the drag. The more line you have out the weaker the line becomes. The more line out, the less control you have. The more line out, the more important drag control is.

Using thinner line and therefore more line on the reel, will just result in the same thing...snapped line or stripped spool.

So my opinion. What your friend says has some merit. I don't agree. What your friend says is logical but in my opinion it is a false logic. Just because I do not agree with your friend does not take away the merit of what your friend is saying.

If I may make a suggestion. I know many anglers would cringe at this. Go back to basics and target the small fish. Use 10 or 12 lb line and let those little fish have their head and use the drag to control them. Once you have the skill to control a 4 inch bream, you can control a 40 inch snapper!! 😊

First day I was using a Ryobi 6000, after I was stripped, the next I tried my luck with Penn Btl 8000, when I could see the line getting completely exhaustede I tried to further tightened the drag slightly and the 50lb line snapped