WTA : How much quota is enough for these usage?,

Hello guys, nice to meet you there.
So, I'm curious around how much of quota do I need for my monthly usage on various thing.

Usually,
Web surfing = 1 to 10 pages per day
IM = Around half an hour or less on Line apps daily (Just text and stickers)
Daily gmail refreshment just to check if there are mail, monthly wise it'll be only 10 emails to send or less
A few apps updates, the small ones
Prefer to turn on data for 7/24
The rest of it I wish to put it on android online game

I'm currently using digi rm30 for 600mb but I wasted it for this month since I was looking for a decent android online game so I reached my quota extremely early by testing tons of them.

I don't mind switching to other telsco provided if their plan gives better data usage : price ratio.

Thanks!