In a fight were the DD's are also getting damage (due to Aoe, or just stupidity) i also like to put barrier on everyone. After speccing into the talent that almost removes the CD and greatly decreases the force cost of the shield, it's way more force-efficient to cast on DD's than to heal them up. Other than that up to level 34 i've had not much force problems while healing, i always use the quick heal after i got the buff from the HoT, and if the tank needs some extra love, i give him the channeled HoT. The long heal is only for panic mode IMO. Also: You should watch out to re-apply the HoT, instead of renew it. Otherwise you will loose a tick from it.