usefulness of the high-end Construction summons?

[Tifone]

I'm not definitively an expert, quite the opposite, but I think a major point for the poison golems is that they require you the same Construction path you need to gear them. Ideally, I think you could go for a strategy (requiring a rainbow pretender of course) of aggressive remote site-searching with the spells (thaum 2, conj 2), some evoc or enchantment to keep you up, and then get to Construction 9 getting at one time the SCs and the artefacts to gear them up. You even get, on the way, to build Golems at Const7 and equip them of Const6 gear. Playing it nice you could start building Poison Golems equipped with artefacts around the time your enemy starts fielding medium summons with const-4 gear and alteration to buff them. Maybe a dream but it could be fast.