For me it's all about gaps in distance. I hit my driver 240-250, I have a 5W that I dialed down to 15 degrees that I can carry 220 so I never bothered to get a 3W as an example. If I can get my driver up to 260 consistently, then I'll probably look at adding a 3W.
If you have a big gap between driver and the hybrid or 4I, then you could look into a club to fill that gap. If you don't have any gaps, don't waste money on clubs you don't need IMHO.