Jesus or Mary?

One of the Protestant's favourite words is "alone"
One of the Roman Catholic's favourite words is "and"
One of the ways Roman Catholicism obscures the glory of the Lord Jesus Christ is to place saints and the virgin Mary in front of Him. The RC doctrine of Mariology includes:

1. The Mother of God
2. Her perpetual virginity
3. Her immaculate conception
4. Her assumption
   There is a strong movement underfoot to have a fifth dogma included: Mary as Co-redmeptrix or Mediatrix, which would have her helping Jesus in his work of redemption and mediation.
   Why do we need anything or anyone else when Christ alone gives us all we need for our salvation and sanctification?