If you are using a VW mod and prefer a low power output setting, there is no problem with that. Should never have a prob unless you exceed your batteries Amp and or Watt limit (regulated mods have safeguards to prevent such issues).Why would lower power cause a problem?
0.2ohm at 30w is only 12A and 2.44v. Personally it sounds like a very unsatisfying vape, but far from unsafe, if the mod can step down that far. Most vents are from battery issues, improperly using a hybrid, hard shorting a battery or overdrawing the battery.
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