It's obvious that Titan is the best. Look at this for example:
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On the left, we have 4 Frontier (4×100 tons of thrust), and on the right, we have 1 Titan (1×400 tons of thrust).
Who would win?
Well, we have the same thrust on both sides, opposing to eachother, this thing shouldn't go anywhere you may say. Let's test:
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Exactly what I said! Why is Altaïr building such a dumb thing? It's obvious that the Titan is better, a single one does as much job as 4 Frontier!
Unless you noticed a small detail...