Hi Sifu's , I just bought tenda ac18 but found out that this router don't have mu-mimo , just shifted house now waiting for internet to be installed but at mean time I want to ask is this router for me?

I play online games mmo fps etc thru wifi, while wife and childrens will use the android tvbox iPhone ipad youtube etc, previously using lan cable no problem even if my bro torrenting also wont affect my gaming. but now new place I only can use wifi , I need consistent ping and I hate spikes , will this ac18 help? or I need to look for mu-mimo 4x4 routers?

I see my pc using archer t9e pcie ac1900 card but spec din write mimo I assume its not compatible then,
but let say all my wife kids and device use 2.4ghz and my pc alone use 5ghz will my ping be smooth and uninterrupted?