I've got a fair number of +3 armor/weapon upgrades for followers but very few flat 615 pieces. If I use an upgrade to go from 600 to 603, then use a 615 piece, is the upgrade overwritten (so the net effect is 615) or do they stack (so it is 618)?
Also, is it normal to gear up followers by applying upgrades to 600 or should I wait for more flat 615 pieces?
Thanks for any advice.