My current holdings are...

Populous = 42%
OMG = 13%
PLR = 10%
LTC = 10%
NEO = 9%
Ark = 5%
XLM = 3%
Steem = 2%
PPP = 2%
ZRX = 1%
LINK = 1%
CVC = 1%
DNT = .5%

Sidenote: The only reason PPT is such a large % of my holdings is because it increased so much since I got it (got in at ~$3CAD and its currently sitting at just under $50CAD). I would normally sell some and move it to new coins to spread out the wealth but in PPT's case I still think it has a lot of room to grow, especially with its platform launching in the next month or so.

I am currently waiting on a wire xfer (which has taken AGES) so that I can get some more LTC, OMG, NEO as well as add ICON to my holdings. Out of these the one I would personally recommend possibly adding to your list are...

LTC = going to to AMAZING things in 2018... MAST, LN, Atomic Swaps, Confidential Transactions... all of which are going to lead to a wide range of major partnerships.
NEO = bit risky but is working on decentralizing itself more over the next 12 months, and would likley increase in value a fair bit if/when China decides to loosen the ICO regulations it currently has in place.
OMG = amazing product and team, adding staking in July 2018 which should increase its overall value a large amount
ARK = smart bridge is going to be game-changing and will compliment (not compete) with the rest of the crypto space
ICON = If you know anything about South Korea... they as going to pump this to the absolute max.