Starter Pack Value

[Knave]

I was wondering if this was even useful to obtain. I have played nutaku for a while now and the recurring theme seems to be to get higher rarity units ASAP, so I usually get whatever starter deal is offered then just rely on reward currency for gacha. However, Aigis is very different. So far I have received 2 platinum and 3 gold units as rewards, but have only used Katie and Cyprea consistently. Iris has been used mainly on the endurance maps. I would guess that royal guard means Alicia is some kind of tank, which I haven't needed often enough to spend money for. My question is that part of the pack is 200 demon crystals, so are either Chydis, Viera or Hien worth oh-ing and ah-ing over? Since they are what is in the trading post. Thanks for any input.