"Expanded arsenal" refers to a wider range of tools, strategies, or resources that are available to someone or a group. It implies having more options or choices to deal with a particular situation effectively. Full definition
Since going gluten - free, I've had lots of fun expanding my arsenal of flours. (thekitchn.com)
Though to balance it, they'd probably expand his arsenal overall outside of the episode and just let you equip that stuff with unlimited ammo like anything else. (novacrystallis.com)
I always look for ways to expand my arsenal of new mobile tools to streamline my workflow, make my life easier, and create more visibility for my brand. (realtormag.realtor.org)