SMN and Turn 1 Coil

[Mitsune]

So the other day I did my first attempt at turn 1 with a PUG. On Caduceus I was one of the main slime spawners in phase 1 as well as phase 2. One thing I noticed was that I was taking a lot of damage because I was getting the slime low at a slower rate. I was trying to save at least one energy drain for every slime and was ruin II spamming and ruin I at times I had enough of a gap. I was too hesitant to put any dots on the slime for fear of killing it by accident and I was also unsure about putting garuda on it because I didnt want her to accidentally kill it.
So basically what im asking is, what is the best way to go about slimes? What do you do to burn it (especially those that appear on the tank's platform) and keep enough distance that you wont get hit, but wont make it explode.

Edit: So I logged out on my SCH for some reason, but my gear is probably not the issue. It's almost full DL, with AK filling in the few spots and I have relic +1.