Is this too duplicative and redundant?

Hi folks, The following Vanguard allocation started before I discovered this amazing sub: VOO, MGK, VXUS, VTMSX, and VUSXX. I am my 40s, living in a US state with income tax. Since I plan to invest more into ETFs this year, of the 5 above, would you recommend that I only increase the holdings of the trio of VOO, VXUS, and VUSXX while letting the others be (not selling)? If yes, is 80% VOO + VXUS and 20% VUSXX a decent plan of attack? Thanks a lot, any advice appreciated.