Question for Warwick mains

I have been playing him a lot but am trying to figure out what to prioritize after devourer for items. I like to get Frozen heart, wits end, Botrk, deadmans/ spirit visage and mercs or swifties depending on the enemy. I have won more than I have lost but always feel very unsure as to what second item to buy, even after about 25 games with him (usually I go glacial shroud early for cooldown and surviving if things go bad early before dates). Haven't tried guinsoos yet either but I assume it would be good. I know most items are matchup dependent but usually there is some normally core things that will be effecient in most games.