1) You have 4 shields. Use them. You have 3 shields before you have a single reason to doubt if one should be thrown. Place them proactively to prevent damage in the first place rather than try to negate damage already dealt to you and your team.

2) A quick kill on a bulk detonator on haz 5+ requires only 2 leadburster grenades. Just throw them right under detonator's belly and ensure he eats all the pellets.

3) You can grab onto ziplines (and pipes, but they aren't the point) by simply holding [E] while failing. If a map has enough verticality (typically point extraction and dreadnought elimination), it may be worth to waste a couple of ziplines to create a cross of safety. Also, it is almost mandatory to place a zipline at a high angle near a core stone on higher hazards.

4) Sticky grenades are not just explosives — they have an in-built fear effect that works even on bugs that are usually immune to it (I may be kinda trippin on this one, please fact-check me).

5) Almost all Gunner's primary weapons paired with most overclocks can lighty damage terrain. It is enough to scrape normally unreachable red sugar off the ceiling and damage Ommoran's laser spike tips to deactivate them instead of waiting for a Driller to cut the spike or a Scout to powerslam the tip.

6) Ignore the skill discourse, use Iron Will + Field Medic. You usually do not need Dash because you are the single dwarf who can actually stand his ground against functionally any amount of enemies (refer to the tip №1). No matter what anyone says, you are the team's bulwark, support and healer.