Re: usefulness of the high-end Construction summons?
 

Baalz's Poison Golem won the first SC vs. SC competition, but lost the second competition. However, the winner for that was also a construct (Micah's pretender IIRC). It's also interesting that different patches sometimes change the winner/loser of the individual battles.

Re: usefulness of the high-end Construction summons?
 

Vortex of Returning has some nice synergy with clockwork horrors to.

Re: usefulness of the high-end Construction summons?
 

Siege golems are quite usefull, well, for sieging. :)
Golems are good, poison golems are also viable once in a while. Mechanical men + wrathful skies are a neat combo, though there are usually better uses for earth gems than summoning chaff.

Re: usefulness of the high-end Construction summons?
 

One unit that didn't get mentioned was corpse man const. are they worth it? it looks like they could be really easily massable, with a staff of storms, and Igor's tome.

Re: usefulness of the high-end Construction summons?
 

They are nice in CBM because of higher MR.

You can mass them even earlier, with a lightning rod. All you need is const-2, E, and a AD caster or 2 spewing them out monthly. They are handy for Yomi IMO to take some of the banishments off your demons.

Re: usefulness of the high-end Construction summons?
 

Does quickening stack with haste?

Re: usefulness of the high-end Construction summons?
 

Yes. Haste halves the AP point cost of movement while quicken just increases AP's.