What do you think of my mtg sliver life gain deck?

If its a life gaining deck then felidar sovereign is a must and replace elspeth tirel for elspeth, the Knight-errant which gain strengthen your creatures make token and as a combo with armageddon since with knight errant your lands creatures etc are all indestructible otherwise my only response to the though of a sliver life gaining deck is Holy Sh*t so simple yet complex i like it.