You can't have two different rules

Monkeynutts

If a creature is made from a spell or support and it contributes to your summoning total for an objective then its strength should also contribute.

You can't have a spell male 12 x 1/1 tokens that add 12 creatures to your summoning total but nothing to a required strength objective.

Similarly other spells like Viviens Invocation contribute nothing to either total objective....

You need to make a set rule for all lile was done in Shadows of Inistrad and stick to it. I should have to figure out if a card triggers certain objectives by trial n error.