Buffing the gunbot respawn antag

[Roomba]

So far most of the complaints seem to be 'they are very weak to sec gear' (which is a fair point), but all the proposed fixes seem to be along the line of 'make them more lethal' (which doesn't particularly fix that problem and mostly exacerbates the issue of SS13 combat being entirely based around who gets the first shot in). Are they particularly vulnerable to anything that a random assistant could get their hands on, or is it mostly just flashes and tazers that they can't handle?