EOF, all I have grown in thus far is TLO, and this is what has always worked for me. I fill the container with my TLO mix and then hollow out the middle (take out TLO) the size of a party cup (20 oz), and fill that with Fox Farm Happy Frog soil. It is a very nice mellow seedling mix, but has enough nutes in it to last until the roots hit the TLO. By that time the roots hit the TLO they can handle the hotter mix. I can almost tell the day they hit the TLO, as they explode.
So I would recommend either Bromeo's method or mine and it should work great for you.
Keep us posted,and happy growing.