Some surprisingly good and effective tactics I must say.
I was playing in a Dominion match earlier today as Swain on the red team. As we were fighting over the Refinery, I got completely and utterly obliterated by a 3-pronged attack combo.
Nunu: Absolute Zero. Malzahar: Nether Grasp. Rammus: Puncturing Taunt.
Nunu used his ultimate as a slowing field of sorts to start off with. This was followed shortly by Malzahar's Nether Grasp and then right when that wore off Rammus Puncturing Taunted me and by the time that ended Nunu's ultimate had just ended, leaving me one hit from dead with no chance to escape and I died.
Now this next part may surprise you, but these were actually Intermediate bots in Co-op vs. Ai who used this tactic on me.
In my most recent match at the time of this post (I was Ziggs by the way there), Warwick and J4 bot killed me with a Cataclysm-Infinite Duress combo (J4 to trap me followed by WW ult inside the terrain to ultimately finish me of and kill me there as well there also).
Now I know some of you might not like that I play Co-op vs. AI mostly, and that's fine, but just know that these tactics can be used anywhere and not just in co-op vs. ai matches only, so there's that at least.
Thank you for your time.