Updated with the completed Checks and Counters section - massive apologies for the delay, I've just been so busy with uni work as of late.
I am strongly considering changing the order of Toxic Spikes / Toxic, given the latter's popularity. I initially ordered it as such due to Toxic Spikes being a niche of Tentacruel, though as it has been pointed out multiple times, Toxic is often far more practical in this metagame. I'd like to get a few more opinions on the matter first if possible though.
Originally Posted by Fat Pocket
shrang actually tested a Sub SD set and it was hilariously effective. Jellicent & Empoleon doesn't "completely wall" them, since against Jellicent Tentacruel can set up to +6, whereas +2 Waterfall actually hurts Empoleon after Rain boost.
That sounds quite interesting actually, heh. I've never actually seen a SubSD Tentacruel in the 5th Gen as of yet, so I don't really have anything to go on. I may give the set more of a highlight in the OO section, as it may in fact work well but hasn't caught on enough for it to be worth its own analysis.