I mean his hard mission can only be completed once per day. 600 days for 5 limit breaks is brutal.

The 2 basics of this game are:

1. Get a unit you want from the summons.

2. Once you get the unit, stop spending Visiore for summoning. Instead, purhcase shards of that unit at the regular shop, daily shop, and the event shops.

It finally depends on how you play this game though.

I think 120 days. Because you need 600 shards.

120 days • 5 shards/day = 600 shards

More or less 4 months.

100 vision for 1 shards. mean i need around 60000 visions to fully LB. and -120 vision if you hard quest everyday. so meaning you need only 48000 visioners ( 480 visions ) to fully upgrades

My mistake.
It's almost 600 days for the daily shard. Cuz you can get 1 shard daily.