Yes you should. It's the best one to spend your Visiore. If you don't have enough Visiore, try to collect by clearing Main Story Quests, Beginner Quest, and so on.
See the ones recommended to purchase below.
・Jadeite Pack I
・Jadeite pack II
・Alcryst (Green) All Elements Pack
・Prowling Wyvern Statue (Green)
・Praying Angel Statue (Green)
・Story Skip Ticket
・5h Exploration Ticket
・EXP Cube (S)
・Faint Memory (Green)
Only available for The first seven ays after account creation.
You can roll the 1st multi summon by 1,000 Visiore, the 2nd by 1,500, and the third by 2,000. The 3rd one also guarantees at least 1 UR Unit.
Each step gacha can be rolled only once.
UR Units & Tier List
MR Units & MR Tier List
Unit/Vision Card Release Schedule
Iron Giant Challenge
SR Units & SR Tier List