It's top 4, nominations don't matter at all so you might as well nominate your closest ally just to improve yourself with the person you leave off the block in case they win Veto and survive.
Vanessa - 4 HOHs / 3 POVs / 1 Final Nom
Steve - 3 HOHs / 2 POVs / 2 Final Noms
Liz - 2 HOHs / 1 POV / 1 Final Nom
John - No HOH / 4 POVs / 5 Final Noms