Will this Multi-box tactic work ?

[zenga]

Yes, since each account is always linked with another (A in your case). But this is not the most economic way imo since the account you grant levels to needs to be lower than the giver.

Scenario 1: A-b A-C A-D A-E
You level up 5x lvl 60
B can grant 30 levels to A. C, D & E can as well
So you end up with 2 lvl 60s on A that you can create ...

Scenario 2: A-B-C-D-E chain linked
You level up 5x 60. (call them A1, B1, C1, D1 & E1)
You level up 5x 20 (matter of hours with Raf). (call them A2, B2, C2, D2, E2).
You level up 4x 10 (A3, B3, C3, D3).

E2 grants 10 levels to D3, E1 grants 30 levels to D3 -> D3 = lvl 50

D2 grants 10 levels to C3, D3 grants 25 levels to C3 -> C3 = lvl 45
D1 grants 15 levels to C3, C3 is now lvl 60
D1 grants 15 levels to C2, C2 is now lvl 35

So we now have (* means they can no longer grant levels)
A1 (60) B1(60) C1(60) D1(60*) E1(60*)
A2 (20) B2(20) C2(35) D2(20*) E2(20*)
A3 (10) B3(10) C3(60) D3(50*)

C2 grants 15 levels to B2 and 2 to B3 (B2 is now 35 anc B3 12)
C1 grants 25 levels to B2 (now lvl 60) and 5 to B3 (now lvl 17)
C3 grants 30 levels to B3 who is now 47

So we have:

A1 (60) B1(60) C1(60*) D1(60*) E1(60*)
A2 (20) B2(60) C2(35*) D2(20*) E2(20*)
A3 (10) B3(47*) C3(60*) D3(50*)

level up A3 from 10 to 17, shouldn't take long at all

B3 grants 23 levels at A2, A2 = 43
B1 grants 17 levels to A2 who is 60 now
B1 grants 13 levels to A3 who is now lvl 30
B2 grants 30 levels to A3 who is now lvl 60
Final

A1 (60) B1(60*) C1(60*) D1(60*) E1(60*)
A2 (60) B2(60*) C2(35*) D2(20*) E2(20*)
A3 (60) B3(47*) C3(60*) D3(50*)

Conclusion:
- You manually level 5 chars to 60
- You manually level 5 chars to 20
- You manually level 3 chars to 10 and 1 to 17
- You end up with:
A: 60, 60, 60
B: 60, 60, 47
C: 60, 60, 35
D: 60, 50, 20
E: 60, 20

In other words you have created 2x 60, 1x 50, 1x 47, 1x 35, 1x 20 extra with almost the same effort than you'd have with your tactic. So I'd really reconsider it.

This is the concept, I'm sure it can be refined here and there as well as it can be extended.