Gayle,Chanders and Sarwan are obviously the most important batsman in the team but for me the performance of Bravo, Samuels and Ramdin will be the key.
all 3 of those guys have to buckle down and score runs in this series. of the 3 only Samuels did good in South Africa and that will have to change, Bravo hasn't made a big score in test in a long time and if there is ever a time for Ramdin to get a big score and maybe even a century that this is it.
West Indies (probable XI) 1 Chris Gayle (capt), 2 Devon Smith, 3 Ramnaresh Sarwan, 4 Marlon Samuels, 5 Shivnarine Chanderpaul, 6 Ryan Hinds, 7 Dwayne Bravo, 8 Denesh Ramdin (wk), 9 Daren Powell, 10 Jerome Taylor, 11 Fidel Edwards.
^that is what cricinfo predicted the squad to be for West Indies, i hope that Devon Smith is not in the starting 11 because he even struggled against Zimbabwe, Chattergoon is obviously a better choice. Having Ryan Hinds in the team gives them more dept in the batting department and a spin option as well but if the pitch is even slightly favorable for spin i expect him to be out and Jaggernauth in.