Also you should try not to open with dots. Yes they are nice but you might aswell stealth, open mangle rake mangle fb then run while putting up dots.
don't really agree with this for either casters or melee...casters can, well, cast so you're just giving them a couple free shots while you scamper away. opening with a DoT on melee gives you a free cast or two before you're in melee range of each other.
...not to mention it was in gurubashi. where am i going to run to? out the door and down the road? the goal is to open the chest, killing the opponent is a side-effect.