Force of Negation is a great combo stopper, but can't protect your own combo on your own turn, rendering it worse than most of the 1 CMC counterspells for purposes of actually winning
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In general, I would look at these two factors when looking to include cards not of your tribe's creature type: Is this creature so strong that it, on its own, is generally stronger than my tribal creatures when they are receiving bonuses and/or empowering my other cards
(If a creature has multiple instances of prowess, each triggers separately.) Whenever you cast a noncreature spell, target creature you control can't be blocked this turn
Heroic Intervention and Teferi's Protection are also excellent ways to protect your entire board
You should also keep an eye on the Pokemon TCG Pocket Wonder Pick menu, to see if anything you want comes up