Warwick jungle item?

I recently started playing WW jungle, and I really like him---- He's extremely fun to play. I usually build him in a veeery odd way: ,, , OR and + jungle item. The Hydra and the Critical Strike items may surprise you, buy they've worked surprisingly well for me so far. My only question is, what jungle item should I use? Warwick's weakness is that aside from his ultimate, he doesn't have much lockdown. Because of this, I often find myself purchasing for it's slow, and it's helped me catch up to Ranged champs or Flashers when my ult is down. However, I see everyone taking , and I see why-- it goes very well with him. But with my current build, could anyone help suggest an item?

(An alternative I've considered is getting for the slow-on-hit effect so I wouldn't need Stalker's)

Thanks in advance for help!