From your list only Telegram ICO gets my attention. The other icos seem like they have potential but the Telegram ICO is the one that will actually make the most noise in 2018.
I agree that Telegram will be the biggest ICO. But speaking strictly of return on investment I think Giftz will be the best choice. They're currently under the radar, but when people realise their potential I believe token price will explode.
Nah man, AgroTech is the one that can easily multiply their value, they have a working product already
Also, according to medium, their pre-sale starts this Friday!
https://medium.com/@agro_tech_farm/statement-ico-pre-sale-fdec39a1fc8