Dude my mara dies so much faster than my dretch it's miserable. I even make more kills with dretch than in a mara life. I have no idea how I'm gonna do a mara guide with my (lack of) skills. I'm gonna havta get someone to send me footage of their mara, or spec someone. The problem is that spec'd footage isn't photogenic for my guides.
Dretching can become like a trance for me, sometimes. You have to know so many things at once. You have to BE the human, so you can know their next movements. You have to time the total amount of shots they've fired, even if they are burst firing, so you can guess when they will reload. You have to know how your camera will mess with you when you wallwalk just so.
The rifle is the BEST weapon to take you out, barring MD possibly. This means that if they "upgrade", their ass is yours. I find that shotgun, Lasgun, psaw, chaingun(not used much anymore), and the prifle are easier to take out than the rifle, even helmeted.
Even flamers and lucis are simple to heavily damage or kill with a poison dretch. You gotta hold wallwalk and get behind em, hit their head, and run away.
Like I said, you can get into a sort of weird rhythm with dretch. Once, I killed 10 hummies in a row, US1 niveus. It was like a religious experience. Then the "HAX!" "FAG", "whore!" insults were just over-the-top euphoria 4 meh.