Firstly, the cloak trick is used to reduce the exposure of a ship on warping out where that ship can’t fit a Covert Ops cloak. You should be exposed for less than a second or so and thus almost unstoppable.
It works very nicely on DSTs.
For a Deep Space Transport you need tank, large amounts of it. You are relying on that, and the intrinsic +2 warp stability to bludgen your way out of trouble. There are preferences in this, but in my Impel I use plate, hardeners and a repairer - over heated then you get 300k EHP and something like 800-1000 EHP repair. Yes, you take heat damage, but fixing that is a lot less pain than “oops, lost the ship”.
In high-sec then there’s not a lot can kill you - it’s an expensive target to gank, more than the likely value of the cargo (if it’s small and expensive use a Blockade Runner - the DST is for bulky stuff). So saying that doesn’t make you immune; so fly with the usual cautions: undock warp-out bookmarks, instadock bookmarks, don’t for the love of god use autopilot, and if you are feeling nervous dock up and go away for a bit.
And learn how to slip away from some fool bumping you (turn away from it towards a warp-out point in line with where he is bumping towards),
I can see the merit of the Medium Micro Jump Drive fit to break range to escape - that probably works quite nicely with the +2 stability.
I’ve had one attack against my Impel. They basically got fed up of trying to kill me and wandered off.