A note from Stop

Fast shrink. Leviathan Spawns at 60s.
Gets really difficult beyond the 3-minute mark - defeat Leviathan and The Orb before then.
You're not really expected to be able to survive more than 3 minutes but if you do there are 3 minutes of very difficult non-loop spawns after that, before the spawnset ends.
Not beaten it myself.
Start radius
End radius
Shrinking rate
Brightness
50
20
0.1
60
Seconds
Spawns
Gems (no farm)
Total gems
0.0000
Gigapede
50
50
5.0000
Squid I
2
52
12.0000
Squid II
3
55
18.0000
Squid I
2
57
25.0000
Spider I
1
58
28.0000
Squid II
3
61
35.0000
Centipede
25
86
36.0000
Squid I
2
88
42.0000
Squid II
3
91
44.0000
Squid I
2
93
52.0000
Spider I
1
94
60.0000
Leviathan
6
100
60.0000
Centipede
25
125
70.0000
Gigapede
50
175
85.0000
Squid II
3
178
85.0000
Squid I
2
180
97.0000
Squid I
2
182
97.0000
Squid I
2
184
107.0000
Squid II
3
187
107.0000
Squid II
3
190
120.0000
Squid III
3
193
130.0000
Centipede
25
218
131.0000
Gigapede
50
268
140.0000
Thorn
0
268
140.0000
Squid I
2
270
146.0000
Thorn
0
270
146.0000
Squid II
3
273
149.0000
Thorn
0
273
149.0000
Squid III
3
276
160.0000
Spider II
1
277
163.0000
Spider I
1
278
165.0000
Spider I
1
279
170.0000
Centipede
25
304
210.0000
Spider I
1
305
210.0000
Squid I
2
307
210.0000
Squid II
3
310
210.0000
Squid III
3
313
210.0000
Thorn
0
313
248.0000
Squid I
2
315
255.8000
Squid II
3
318
263.4000
Squid I
2
320
265.9000
Spider I
1
321
265.9000
Thorn
0
321
273.3000
Squid I
2
323
280.5000
Squid II
3
326
287.5000
Squid I
2
328
290.0000
Spider I
1
329
296.8000
Squid I
2
331
303.4000
Squid II
3
334
309.8000
Squid I
2
336
312.3000
Spider I
1
337
312.3000
Thorn
0
337
318.5000
Squid I
2
339
324.5000
Squid II
3
342
330.3000
Squid I
2
344
332.8000
Spider I
1
345
338.4000
Squid I
2
347
343.8000
Squid II
3
350
349.0000
Squid I
2
352
349.0000
Thorn
0
352
349.0000
Thorn
0
352
349.0000
Thorn
0
352
358.0000
Squid III
3
355
359.0000
Squid III
3
358
360.0000
Squid III
3
361
End of spawnset