easiet strain to grow?

so i have bought 20 seeds in total..they are "Easy Bud" and "The Church" from Alien...non of them is a success..the furthest i went is easybud with a plant follow of yellowish leaves which did grow some bud but is really low in potency.

I wonder if it's bcos of the weather here as i live near the equator..it's so much warmer here..the grow box that i have have a temp around 27-30c most of the time.

Can someone please suggest some easy strain to me before i went to buy another bag to tried it out?? THANKSD~~!!!