the +18 version shouldnt be region locked, but the all-ages aigis is region locked.
both Rinne (new black feng shui) and Rachel have high range during skill, almost 400 (rachel slightly exceeds with SAW). Miruno herself has 400 range.

also, I understand that everybody will have some misgivings about starting anew on dmm aigis which is so far ahead, but I can only say that it's better late than never. and my dmm aigis accounts have more or less surpassed my nutaku aigis accounts, considering they have around 4 AW units against my nutaku aigis's 5 or 6, yet on dmm aigis I have 3 barracks and a wider selection of units for event clearing. it did take me 6 months on dmm and 10 months on nutaku to get this far though.