The CB5 is NOT eco ...
1st line : CB5 @ 100%
2nd line : CB5 @ 100% / BT10 @ 121.22%
3rd line : CB5 @ 156.62% / BT10 @ 121.22%
4th line : CB5 @ 156.62%
The point is , the eco is always less than 4 and far less even with BT10 at TT price ...
Let's hope u'll get CB5 and BT10 at TT price , ur eco will be 4.005
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Opalo is exactly the same as the CB5 (exept the markup and fast rate of fire for the CB5)
===> CB5 : 6.4dmg/sec Opalo : 5.867
Now , add the A101 to Opalo ...
I am hardly BLP addicted !
But , for a beginner (noob ...) , the best choice is Opalo + A101 (more eco and faster dmg/sec than CB5 + BT10 !!)
PS: Thanx to Entropedia.info and entropiatools.com