Hello!
There isn’t a single option that includes both all plugins and all Action Combat DLCs. To get everything, you’ll need to purchase both bundles. My suggestion would be getting the bundle $99.99 first because it contains all plugins, including RPG Maker Action Combat. Then after you've tried Action Combat plugin, feel free to buy "All Expansion of RPG Maker Action Combat" bundle, which gives you VFX packs and premade eventings I created. These DLCs are never required to use Action Combat, they're just additional resources for people who want to learn eventing.