Originally Posted by Incendax
Multiple Deathcaps are only for the ignorant. There is nothing that a second Deathcap can offer you that an Archangel Staff cannot offer you in addition to several other benefits.
The only question in my mind is whether it is better to buy an Archangel's first or a Deathcap first.
This is not entirely true. If you wanted to, you could stack Deathcaps on non-mana champs like Katarina, Vlad, etc. I'm not saying it's a good idea at all, but in those situations, Deathcap stacking is far more effective than Archangel's stacking.