The best level for this achievement is level 116, earning about 4190 coins per playthrough. Here is a picture of level 116.

Here is the list of every level's value, separated by world and also with the best earning level from each world listed.
World 1
1. 740
2. 1080
3. 1640
4. 1820
5. 2060
6. 2380
7. 2865
8. 2645
9. 2760
10. 2555
11. 2780
12. 2730
13. 2760
14. 3180
15. 3275
16. 2940
17. 3055
18. 3095
19. 3045
20. 2890
Best Lvl: Lvl 15 - 3275
World 2
21. 2975
22. 3225
23. 3360
24. 3530
25. 2980
26. 3310
27. 3670
28. 3680
29. 3550
30. 3435
31. 3285
32. 3515
33. 3010
34. 3275
35. 3320
36. 3480
37. 3150
38. 3480
39. 3300
40. 3370
Best Lvl: Lvl 28 - 3680
World 3
41. 3275
42. 3315
43. 3380
44. 3180
45. 3395
46. 3405
47. 3325
48. 3315
49. 3285
50. 2960
51. 3460
52. 2870
53. 3380
54. 2955
55. 2945
56. 3235
57. 3425
58. 3505
59. 3290
60. 2635
Best Lvl: Lvl 58 - 3505
World 4
61. 3820
62. 3745
63. 3620
64. 3550
65. 3555
66. 3065
67. 3460
68. 3250
69. 3060
70. 3255
71. 3450
72. 3005
73. 3255
74. 3060
75. 3320
76. 3450
77. 3400
78. 3875
79. 3635
80. 4065
Best Lvl: Lvl 80 - 4065
World 5
81. 3785
82. 3855
83. 2975
84. 3480
85. 3240
86. 3180
87. 3670
88. 3480
89. 3135
90. 3690
91. 3280
92. 3390
93. 3155
94. 3535
95. 3240
96. 3295
97. 3340
98. 3775
99. 3740
100. 3605
Best Lvl: Lvl 82 - 3855
World 6
101. 4155
102. 3840
103. 3680
104. 3325
105. 3920
106. 3790
107. 3790
108. 3670
109. 3400
110. 3245
111. 3370
112. 3555
113. 3700
114. 3995
115. 4185
116. 4190
117. 3685
118. 3555
119. 3055
120. 3930
Best Lvl: Lvl 116 - 4190