Takitaki does not appear to be suited to play SLB; I don't see the fluidity in space needed for coverage from him. Warner is the only OLB of the top 5 who has shown that fluidity, IMO, although I think Cook has the most coverage potential out of the other four.
I see our SLB as Warner and Cook, with Takitaki and Hinds as our top two WLB. I'm not a big fan of Tautu; he is quite slow.