I see your point. The thing is that, as you need a lot of cards for the combo, waiting for a TU won't hurt you that much, and it will enable you to set an impressive 24 dmg on the table in one turn (plus 48 the next turn), just in case everything else goes wrong. Plus, I remember once using 4 colours in a Decay killer (minor vamps + momentum + adren + quint + p shield) which, despite being much more aether-quanta-heavy than this + TUs, got me 100% win + 100% EM rate (against Decay, that is).