Mastery setup prior to AW placement phase

If I use non suicide and choose champs to place in AW, after it's locked, and I switch my masteries to suicides, what will happen? when attack phase starts, do my defending champs suffer from effects of suicides or not? Just wanna make sure. Thanks guys.
0
Comments
thanks!
the effect of boosts only affect attacking champs, not the defending ones, right?