This logic is flawed. Buffs do not affect the Steam Tank. In the case of Occam's Mindrazor (which is the best pun in the whole book IMO) it is a spell effect that modifies the strength of the target unit. The Steam Tank is not the target of the spell effect, therefore it works. It is not immune to something that does not affect it.
But the same is true of the lifebloom perk. The steamtank isn't the target of the original life spell.
I find the bit you quoted inconclusive.
Of course the lore perks alter the way a spell behaves. It adds a special rule that happens when the spell is cast, and of course it only works on spells from that lore. That's not really the issue and that's all that quote talks about.
But not everything that happens in relation to a spell is a 'spell effect'.
Using your interpretation...
a shadow wizard hitting the steamtank with penumbral pendulum could *not* use smoke and mirrors because it is a special spell effect attached to the spell targetting the steamtank without a S component.
Fire mages attacking the steamtank wouldn't get the bonus to casting for previous fire spells on the steamtank
Beast mages casting amber spear at the steamtank wouldn't get the bonus to casting
I find it highly dubious to claim that all the perks are spells.
They only affect spells, and are not, therefore, standalone abilities.
This claim won't fly. Using an item that adds to your casting value only affects spells, but that's not a 'spell effect'. Are you saying the steam tank is immune to, say, the staff of volans?
You have to define *exactly* what a spell effect is. This has not so far been done. I believe it to be only the text underneath each spell that tells you what happens after you successfully cast it. Other people are arguing that spell effects are....things that only effect spells. This is clearly wrong.
You need a much more precise and rigorous definition.