Also is god team in general the best for now? Should I not bother with adapting to the magic weakness of mosnters (earth, fire, water, air)? Are prayer potions value the effort/money nowadays considering the nerf to OSRS gold shield from prayers? First, some more general advice: I've been advised Dragonrider buys at half of the ge cost... but proceed for Bandos nonetheless. It is super cheap at this time. (~6m for your Chestplate and Tassets)

Now, to answer your question about stab/crush/slash weapons, allow me to explain how monster weaknesses work with a good example. Steel dragons are weak to Water charms. This indicates is you'll have the most accuracy with Magic (Water spells in particular.)

Likewise if a monster is weak to Crush, like Jadinkos, this means melee is the most true attack style against them, and Crush is the very best style. Comparatively, Range or Mage will have lower accuracy. (Even though at high levels, your gear is usually good enough that there is no huge difference.) To conclude, keep your Dragon scimitars, and do not buy other melee weapons. They'll suffice for everything that's weak to melee.

Similarly, stick to double wielding range and magic. I am guessing you do not have anti fire potions, so steer clear of dual wielding. Also, dual wielding enables the use of a defense as well as the Rejuvination/Resonance skills. Likewise with elemental charms. Personally, I have a great deal of elemental runes stashed up, so that I always just use the creature's specific weakness. It's up to you however, you'll hit well enough with atmosphere spells.

If you're playing EoC, then you shouldn't have to Buy RS gold use protection prayers all that much. The healing skills - Rejuvenate, Guthix's Blessing, Ice Asylum as well as Regenerate coupled with some cheap food is generally good enough. Don't bother wasting money on them if you don't plan on using Soul Split, Turmoil, or even the Zealot boosted normal prayers.