A shield slot will probably involve an illuminated god book. Together with RuneScape gold Zamorak's book costing an unholy 22M, a far better alternative is armadyl's book of legislation in 1.7M: it's only got 2 less ranged offence, but it also includes defence capabilitiies and as soon as you've illuminated it you'll get a nice big prayer bonus. Your cape ought to be ava's unless you are doing something in which it won't do the job, such as shooting ogres in a cage. In that situation you need to wear your best ardougne cloak or something else with offensive/prayer bonuses. Red dragonhide, naturally, if you don't would like to get emptiness. I hope that helps!
Looking at your charms I'm not entirely sure you might make 69 without getting more charms. With golds using barker toads you would need 1840 gold charms for 160k xp, greens it is 1620 using Ibis, Crimsons it's 569 with stranger plants and blues you're probably going to need to store but it's 343 using kyatt's or graahks.
Up front, that is about 1.5m for toads, 4.7m for ibis, 2.5m for stranger plants and 3.4m for Graahks (4.4m for Kyatt). A mixture would be somewhere in between. If you are lucky you'll return around half that through selling the pouches. The exception being that the blue pouches which could make your cash, but you'd have to find a productive source of gloomy charms.
I personally think you'll be hard pressed to invest significantly less than 1m and more probable you'll at least be spending 1.5-2m over the next 3 levels. Summoning is one of those bite your knuckles and don't think too much about costs. It'll be worth it to get those levels, Yip, Tort and Bat are all useful familiars, but that I simply don't know of any super economical method that doesn't take a ridiculous amount of prep time. Abyssal Lurkers (Which require farming abyssal creatures to abyssal charms) and Graahks/Kyatt's being the only really profitable/sellable familiars I understand of below 66.
I am not searching for the very exp components, I am searching for components that can sell back, to help minimize my loss; I only have two mill in my own home, but want 69 summoning, and I DO plan on using as much charms as needed, even all if I must.I know most of those: Agility- Do the Barbarian course until level 52, then perform the wilderness course. Food should be ~three agility level boosting pies with a few tuna. Simply bring a spotted/spottier cape. Thieving- I think the thieve's guild is what's good, but cheap RS gold I do not possess 70 thieving either, so I am not sure.