Kindred is rather weak, you need to collect at least one marked camp to be strong. Even though Kindred's kit is to counter Tanks, some tanks actually counter Kindred, and hard. Even if you know how to play let's say Zac, and Kindred, if the other junglers know how to play Zac and Kindred too, Zac will win. Zac is my favorite counter pick for Kindred due his % damage and with the right build A E + W+ R + W will kill Kindred before they can do anything about it. no AA's, no Ult.
Now with that said, Kindred is just another ADC. Cannot be a frontliner, Kindred needs to wait for someone to make a pick, in other words you need two front liners. As most supports, they are backliners to protect their carry and this is something interesting. Kindred's E and W and the ult offer the best protection for the backline. I would sugest an APC and ADC with a push ability such Tristana, Syndra as for the support Leona, since she is an all-in champion. Hard to come back once she dives. Then another tank to hold back their carries. What I find extremely useful on Kindred is if you build Spirit Visage to use it with their ult, naturally all tanks will get that item, which means Kindred's ult will buff them in health more than Kindred since they changed Spirit Visage to increase the heals from any source. This means, enemy Kindred's ult will work on it. This is a huge disadvantage for Kindred.
And to make Kindred stronger I could also suggest to not take ghost since your Q is on a short CD, and when W's activate it's even in a shorter CD. Taking other spell such Teleport, Ignite, Exhaust is more viable. If you get teleport, and homewards or distortion, that means you can gank more lanes who had the mark and get a kill, get more stacks for your passive.