Ok, I'm no expert on the new ultramarine stuff (I need to get the new C:
SM at some point). Hopefully someone can correct me if I'm wrong on this but I imagine the warping across the board works something like deep striking. If this is the case look into Coteaz and his retinue. They can really throw a spanner in the works for anyone deep striking, mishaps etc.
Was one of the riptides an O'Vesa? If not their shooting is nigh on useless without marker light support. Even if you use all your turn one shooting to do it, wipe out his marker light stuff and you'll cut the effectiveness of those riptides considerably. He may get some lucky rolls but everyone's luck runs out eventually.
Did he use the scouts for a locator beacon? That would help him with the deep strike stuff but coteaz can counter that. Land speeders have paper thin armour so even your lasguns should be able to take that down through weight of fire I would think.
Coteaz isn't a one tool fixes everything but if your opponent isn't expecting him it can really throw his game off. Also, keep your army a bit spread out but close enough together to prevent any "landing area" big enough for his suits to come in. I don't believe he can land on one of your units without mishapping. Same with terrain, this can be a cheap coteaz replacement strategy.
Focus your fire on key targets, marker lights, broadsides etc. once you know your enemy you can find the way to reduce their effectiveness. Tau guns are big and scary but without marker lights they have a 50/50 chance of hitting at best. At this point your armour comes into it's own as the heavy hitters can't mass fire on them. If anything tries to charge you tie it up with some cheap grunts.
Tau are a top army, but if you exploit their weaknesses they can fold pretty quickly. I'll see if I can find out about Tigurius, he's a space marine so he must have a weakness somewhere

. Ok, hope I can post this here!
http://www.belloflostsouls.net/2013/09/space-marine-reviews-tigurius.html?m=1
Get him in close combat seems the answer or hit him with AP2 weaponry.