User blog comment:RoznosicielCiast/OP stuff not that good as considered by everyone? Balance, countering, sticking to meta without thinking, Riot's fails/@comment-8506165-20130811023749/@comment-6061249-20130811072035

The problem with Guillotine is simple, two minutes without comeback to lane time gives max 60-80 seconds of time without using it. It's gap that can be used only for very aggresive gank. I'm playing Darius on top oftenly and it's simply hard to engage a fight that fast.

I'm also rather using Beads + pots or armor + pots. Shield is situational item that can be taken if facing AA trade/poke champion or hardly AS based duelist, as you said, Fiora for example. It also gives some health, it's important part of its statistics. Selling Doran in mid/late game does not hurts that much, it's only a bit more gold lose than one minion wave.

12 seconds oftenly should be okay for teamfights, but sometimes there are situations like grabbing out enemy carry before teamfight begins due to his bad positioning. Of course, his Flash is ready, so sometimes you have to use Guillotine or else you risk losing an easy kill. Then, when teamfight begins...