I understand the needs to get a surround and I definitely need to attempt this more often. However, baiting doesn't seem to work. They will sit outside of creep with their army (preventing me from spreading it) and then send like a murauder and 3-4 marines to clear other creep and poke at my army etc. They simply stim back after getting aggroed and sit back with their army. Even if they only pick off one creep tumor it feels and though they slowly creep forward themselves until they force me into a fight. At that point I just get wrecked. I'll continue to try to surround them as they camp outside of the creep because Bio standing still (LOL DIE WITH ACID AND FIRE BY BANELINGS) would definitely be something to capitalize off of.
As for toss, I can't imagine how frustrating it would be to lose expensive units by a cheap mine shot, but don't you guys have it easier? I mean, if you have ANY tank zealots they will be the ones dying (unless target fire) and usually you guys use zealots as a mineral dump anyway. This speaking aside of twilight council or stalker heavy pressure at all. Still, you guys have stalkers which I believe outrange the mines. I would think that the mines would do indirect damage by forcing you back and almost being used as a meat shield for the infantry. Or I'm just bad at toss :p