Ok firstly i Give this a 4/10. Let me tell you want to go into mroe detail about taht won take long. You mentioned nothign abotu prayer - That I saw. Prayer can be very usefull and make up alot of an obby mauler. go into the detail of what each level delivers and the cons. e.g. 13 prayer can make you max 2 more thne your normal max with only adding 3 to your combat level. same with some with other revalent prayers. Do the same thing with attack and what teh cons are. You mentioned that you want to keep hp as low as possible. On an obby mauler the HP is one of the most important skills. One of the keys to a good obby mauler is having high HP. Go into more detail about slayer and what the master are and where the masters are. also just touch on the fact that you can hunt penguins for slayer exp which is highly reccomended.
In summing up I find this a good guide once it is finished with some extra detail but it is too self opinionated. Try making a broader veiw of what a good obby mauler is? Ok thanks in advance even if you just read this post
as a tip if u do make obby mauler dont put the word obby in it lol. Cause if u give up on mauln u look like an idiot if u have dds and ur name is "obby 4 lif3" lol