Support Rek'sai is actually decent

I tried it before and sucked but I'm a little better now and realize that her poke is really strong lol.

The damage is nothing to rave about but when you hit 2 targets it really add's up in the bot lane, up to more than 50% her total damage end game.

It's got 1650 range, no mana cost, scaling cooldown with ranks so it gets really spammy, and the missile travel speed is so fast it's extremely hard to dodge/block/shield. Not only that it reveals enemy's hit for 2.5

The rest of her kit is pretty decent in a 2v2 lane as well, with lots of aoe damage and cc, passive gains more fury vs 2 targets and it sustains her after trades, portals are even more useful and easy to set up around tri-bush and dragon providing map control including her free teleport to them, and her Burrow can see incoming ganks/scout.

Gotta say when done correctly it's a solid pick, so long as your comp has enough late game magic from solo lane or adc(corki/kog).