The "star" arragenemnt is way way worse then the "chain" arragment. But kinda late now
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But ya if you level 4 to 60 you can grant to alts on the main. I would level 4 alts to 30 on the main account , then you could grant them all up to 60 with the four star accounts. You could do 2 to 60 but its kinda waste to grant levels under 30 cause they are easy/fast to get. Then you would have 8 characters level 60.