Icaras would be rivals to Van Uber, both were purity of the sport teams and saw it as a rivalry to test their craft in a combat rich environment. Their craft are designed to weave through heavy barrages through sheer agility and Icaras having a literal flight system that let them fly over hostile craft. And what does Tigron have to gain from taking out Goteki? A Three way grudge match between Auricom, Tigron and Goteki is only good for overtel, Goteki doesn't care who they fight so long as they fight while Tigron will do it to maintain Overtel's power.