Furlan used to play as a IGL, Sidney? hmm not the worst option but still, szpero good sniper and IGL experience, oskarish? i don't know what to feel about him but seems isn't that bad if illuminar still is in the top.
Toao was great before VP curse got him. I believe Taz and Neo can still be great IGLs. Maybe not in fragging but in expierience. Your team is full of amazing fragers so I think it will work like in Mad Lions 1 Legend who will teach 4 amazing players