heimer:
turret placement (offense/defense)
rocket spam (mostly for enemy champs that get 2 close)
grenade (defensive) usage 2 blind possible ad champs that are attacking u or ally's
dmg enemy tower

overal: keep pressure

cait:
keeping pressure on enemy champs in lane (keep them off ur own/ur teammates back, ur goal is tower, kill if its surekill, else let it go)
pushing creeps
q harras (mostly on champs/also use on clearing out incoming creeps that are deffing turret)
trap usage: either for pressure or defensive use (possible jungle ganks)
dmg enemy tower
ulti usage: either 2 kill enemy or force enemy to base

soraka:
battery for team keep health / mana up from cait & heim. heimer has priority but if cait needs mana for a finishing blow on q or ult use it on her
silence usage: mostly used on enemys that jump into u (and ur turret) ur silence is very important as it buys time in a fight, and in this amount of time u will be kiting them in heimer turrets disabling the enemy from making use of skills, for example: akali jumnps into 50% hp heimer >now instantly silence akali then heal heimer if akali is autoattacking, her dmg output decreases while she takes dmg from turrets / rocketspam/ cait wich bursts her down killing her or forcing her 2 back. and this is just 1 example from ****loads of situations
just use ur silence wisely as it has a cooldown
ulti usage: same for heal or maybe for boosting heal or when ur heal is on cd/ also keep eye out for teammates getting into fights but also dont loze focus on the lane ur in, heimer could be dead within a split second because u was watching botlane farm.
also dmg enemy tower when possible.
maybe bring some wards in between 2 see incoming ganks.

its not trolling! FFS!@#@!

THIS SHOULD MAKE U CLEAN UP ENEMY TURRETS 2 FAST.