MEW is more than ok,but best is to invest in ledger nano s,for extra safety.
I second investing in a hardware wallet. It the most secure way of handling funds.
So far hardware wallets are more secure than online wallets even tho they are doing their best to up their security. The problem is that storing your tokens is a bit more tricky on hardware then online, but it's doable if the are ERC20
On page 40 of the wallpaper you can see that the team does write that they plan to explore hard wallets in the future precisely because of the additional security. For now, though, they will stick to soft wallets (apps).
That requires any additional development on their side?