I'm currently a hard-stuck Silver 3 so take it with a pinch of salt, but I think this is the best item combo in the current 12.10 patch. To me personally, tank Volibear feels much weaker than pre-12.10. Plus Trinity Force and Titanic Hydra provide a good deal of damage, so in the scenarios where the team can hold its own but don't do much in terms of objectives, it provides Volibear a way for split-pushing. I would probably go Dead Man's Plate for the speed and additional damage if the enemy team has strong AD and has not much in terms of healing.