QW2 - Stacking abilities

[supercow]

If I have an item or augment that gives +1 to an ability, and I have that ability maxed out, does the additional +1 add anything, or is it just wasted?

 

e.g. 2 battle medic or 3 poison rain

[Randomizer]

Items let you stack past skill point limits. Some can be very helpful.

[supercow]

Is there any information about what this does? There are no tooltips that tell me what 2 battle medic does vs. 1.

[Randomizer]

From Information Guide: You can scroll down to descriptions on skills:

 

Field Medic - Gives heals, curing, and blessing a 25% chance per point not costing action points

 

Each point or skill level increases the chance by 25% of not costing action points when used.. So at level 2 it is now 50% chance.

 

For something like poison rain it increases damage or duration.