Since adding the champion item set-skill Diassembly mode, nothing has been changed about forge (and chain drive). The result is that despite the item set-skill skill being meant for damage dealing, it is not as effective as Shield mode, which was designed for tanking.
A step-by-step solution can be found here (in polish?):
http://board.pl.runesofmagic.gameforge.c…ane/#post682341
Essentially just edit the code to increase chain drive activation rate to 80% (currently 30%) only when the player has disassembly mode active (rather than shield form). This will ensure that players are using the "damage mode" to dps, and the "tank mode" to tank, and not "one mode does all"