I am level 75 which was a pain to get to. I farm on lvl 61-63 zones I have ok gear mostly lvl 70. I am following this build guide http://www.pathofexile.com/forum/view-thread/1951094, but now I die constantly. I am not sure if its the settings I use on the bot or what.
OldRoutine logic will only get you so far, but from what I understand a lot of people are using it with many builds with success even though it's not a "smart routine". What are your rough HP/ES values (don't have to give exact)? Watch the bot, and look at what you're dying to. A lot of times its from lack of damage mitigation (try equipping and leveling a decoy totem). Use a golem if you're not already. Avoiding burst damage from packs of mobs is usually the biggest killer if you don't have really good gear, so start there, but if you're doing non-map content, it just sounds like a gear issue.
I find a stun-sunder build to easily be the most bot friendly. See for the build I'm currently using. (Slight gear differences) I'm running T14 maps without an issue unless it's Temporal Chains or Phys Reflect maps. (Gear is fairly cheap too, only Belly of the Beast is expensive, and Lion's Roar if you really want to get it, I don't find that I actually need it) Really, if you're dying to low level mobs at 75, then you really need to invest in your gear and probably take a look at your passives.
Have you made any gem-changes or any changes to OldRoutine? Playing the same build, which is indeed working really well, but I'm not happy with the usage of the Warchief. Too often, without any logic on trashmobs etc. .. I've already wiped alot because of this shitty animation, which is used first on mobs, before just nuking them down... Best example are strongboxes. There are 100000 mobs spawning and the stupid routine needs to cast totem first, even if no singletarget is needed and no elite is around ^^
Warchief just makes clear speed a lot faster when there's a bunch of packs. I haven't made any changes, and I rarely die. (I also keep upgrading my gear if I find anything good dropping)