Welcome to the community.
First off I'd suggest you to join 'ICE' clan chat, this is due to expertise knowledge of Ironman progress and skilling advice.
Next thing I'd suggest you to do is go mine some Pure essence. As @7ashkal suggested this is the freeway to a solid damage for a low effort.
As you have build up a decent amount of Chaos runes you might want to start doing Slayer to achieve atleast level 58 (Cave Horrors = Black mask) you might also want to kill Baby blue dragons to get an inventory or so of baby bones which should leave you at around 45 Prayer (decent for overheads + Magic boost prayer)
Last but not the least I'd suggest (as others have done aswell) to pickpocket master farmer now and then to earn yourself some Herb seeds as you might want your Herblore level to sustain the brewing of Super Attack + Super Strength potions before you start the Melee grind.
If you have any questions according to this post feel free to PM me or as I stated in the top: Join 'ICE' for support.
Best of luck - and remember if things gets tough. You're supposed to be an ELITE Ironman *kisses*