Your portfolio is great according to me. I would just remove one of the last 2 coins and include a solid coin like ETH/LTC/Monero/NEO.
VEN is great. It is good for long term hold and since people are collecting VEN for the nodes there would be less circulating supply so i expect a price rise. VeThor is also coming out soon. All other coins seems good just make sure to include a solid coin too and don't be dependent on the last 2 coins especially because VEN (soon to be VET ) and Oysters are certainly good choice.