Not really
In the LRB enviroment a high FF is very importent to ensure a steady cascflow. therefor i recomend a FF of 9.
The human teams major strenght is it ability to play all kinds of game from the get go. To maximice this a Allround start up is vital. By taking 3 Blitzers you have chosen a style that involves direct combat as the means to ensure victory and has excluded the very good human catchers. With the relatively low cost combined with 2 good starting skills, they are a bargain at 70.K Furthermore they are vital to the passing game of the humans.
Use the 2 (buy 2 more as soon as possible) Blitzers as support together with the linemen to let the catchers score.
But then again, this is just my conservative way of building the human team.
Best of luck in the league
Poul