Tried searching this for a bit, but maybe I'm just not using the correct phrasing. Following is what I know about the protection enchantments in minecraft (source being the wiki, and a few of the things my searches actually turned up):
1. Each level of Protection adds 4% against most damage. (no idea what is or isn't covered)
2. Each level of Blast/Projectile/Fire Protection adds 8% vs the associated damage.
3. Levels are additive across armor piecesl
4. Maximum reduction in this way is capped at 80%.
So my question is, if you have the following:
Helm of Blast Protection IV (Blast reduction 32%)
Chest of Blast Protection IV (Blast reduction 32%)
Legs of Protection IV (General reduction 16%)
Boots of Protection IV (General reduction 16%)
will you have Blast Reduction of 80% (32+32+16+16= 96, reduced to 80)?
What does Protection cover anyway? Does it cover Blast/Fire/Projectile?
General Protection reduces all forms of damage except for hunger and void damage and will stack with any other type of protection (Fire, Blast, Projectile, Feather Falling), as noted in the Wiki; it will even stack with enchantments on the same piece (normally only attainable with Feather Falling):
For example, two pieces of armor with Blast Protection IV (EPF 8 each) and a single piece with Protection IV (EPF 4) would give a total EPF of 20 versus explosions. Any additional EPF would be wasted against explosions (but might be useful against other types of damage, if applicable).
Also, you can have just one piece of Blast Protection IV and still get the maximum EPF (8 + 4 * 3 = 20), while getting more protection from everything else (IMO, general Protestation is far superior and is all you should want, though there is a case for maxed-out explosion protection on Hard(core), where a creeper explosion can deal up to 16.6 damage in full Protection IV Netherite). In addition, due to a bug Blast Protection has no effect on explosion knockback (the report is for 1.16.x but 1.6.4 has the same buggy code so this can be assumed to affect all versions).
Thank you, that is what I wanted to know, guess I overlooked it when I was reading.
What I am going for is just some 'flavor' armor. I have a skele grinder that I switch to hardmode when I'm using for more XP. I get alot of enchanted leather, gold, chainmail and sometimes iron armors. What I've taken to doing is grinding any without a max level enchantment for more xp, and keeping any with max level enchantments to combine into a series of sets for decoration. So one set of Blast Prot, one of Fire Prot and one of Proj Prot with the same set up as my first post. Maybe even wear them once in a while for challenges or something.