That being said , i have a question about retirement: i was wondering considering the fact that you can switch loom point from alts to main , isn't it better not to retire the main character in order to get high level on it ?
This would normally seem wise, but gaining levels above 31 takes INSANE amounts of time. The increase in EXP requirement doubles every level past 31, leading to an insane amount of exponential growth. Here's the official stats of required EXP by level:
29 XP:3,573,418 TIME (h):59:33
30 XP:4,420,577 TIME (h):73:40
31 XP:8,892,403 TIME (h):148:12
32 XP:17,784,806 TIME (h):296:24
33 XP:35,569,612 TIME (h):592:49
34 XP:71,139,224 TIME (h):1185:39
35 XP:142,278,448 TIME (h):2371:18
36 XP:284,556,896 TIME (h):4742:36
37 XP:569,113,792 TIME (h):9485:13
38 XP:1,138,227,584 TIME (h):18970:27
39 XP:2,276,455,168 TIME (h):37940:55
40 XP:4,552,910,336 TIME (h):75881:50
If you want the most amount of loompoints in the least amount of time, always retire at 31. If you have all the looms you need for a build you want to dedicate and progress beyond 31, feel free to do so, but focus on the grind early on.
EDIT: Also, the more you retire, the more your generation count goes up. You get a small EXP bonus every tic (30, I believe) along with getting a small amount of extra gold. This makes leveling increasingly easier especially if you have a high multiplier as you gain an exponentially larger amount of EXP and gold compared to the "base" amount (50 XP and 100gold).