Echo/Leveling

Echoes can get stronger by giving them EXP and gaining levels.
==Echo Leveling Table==
CurrentLevel	EXP to Next Level(Cumulative EXP)	EXP to Next Level(Cumulative EXP)	EXP to Next Level(Cumulative EXP)	EXP to Next Level(Cumulative EXP)
Rarity 	✦✦✦✦✦ 	✦✦✦✦ 	✦✦✦ 	✦✦
0 	400 	320 	? 	?
1 	600(400) 	? 	? 	?
2 	900(1,000) 	? 	? 	?
3 	1,100(1,900) 	? 	? 	?
4 	1,400(3,000) 	? 	? 	?
5 	1,700(4,400) 	? 	? 	?
6 	2,000(6,100) 	? 	? 	?
7 	2,400(8,100) 	? 	? 	?
8 	2,800(10,500) 	? 	? 	?
9 	3,200(13,300) 	? 	? 	?
10 	3,600(16,500) 	? 	? 	MAXED(?)
11 	4,100(20,100) 	? 	? 	
12 	4,600(24,200) 	? 	? 	
13 	5,100(28,800) 	? 	? 	
14 	5,700(33,900) 	? 	? 	
15 	6,400(39,600) 	? 	MAXED(?) 	
16 	7,100(46,000) 	? 	 	
17 	7,800(53,100) 	? 	 	
18 	8,700(60,900) 	? 	 	
19 	9,500(69,600) 	? 	 	
20 	10,500(79,100) 	MAXED(?) 	 	
21 	11,500(89,600) 	 	 	
22 	12,600(101,100) 	 	 	
23 	13,800(113,700) 	 	 	
24 	15,100(127,500) 	 	 	
25 	MAXED(142,600)