The Rise of Phoenixes made me think of Moon Lovers Scarlet Heart Ryeo. Both stories are about a prince who is abandoned by his imperial father, and mother. Both princes are used to fighting and murdering since their childhood. They have to compete with ambitious siblings in the struggle for the throne. Both are emotionally scarred by family issues, but super smart in plotting and survival. As for the love interests in both series, those girls are both too nice for their own good.