Great Enhancement & Safe Enhancer are the only things worth it and you obtain them in game. I already have a few of these I've been saving. Even then you should just stick to using Enhancement +50%. I have hundreds of these.
This AC scratch isn't worth it even for those that want to follow a P2W dynamic. Calm down. These support packs also exist on JP. Welcome to the F2P world, first time? If buying Moon Atomizers is really denting your wallet, you're doing something wrong.