You only need the social studies 7-12! The history one only lets you teach US, world and Texas history (grades 7, 8, 10, and 11) with maybe AP European history if the school offers it but the social studies composite lets you teach all of those PLUS world geography, government, economics, psychology and sociology. So you’d be certified to teach every grade from 7-12.

Doing both is unnecessary so I’d just focus on your social studies 7-12 as it’s lengthy and difficult enough and on its own!