So , my second guide is gonna be a merc guide.
Merc is the master class of a holy warrior that went soldier on his second job change.
They are cappable of doing a load of things in the current patch (9.6) and are widely considered the best low budget class at the moment.
The reason for this is the fact that mercenary can get a load of aoes which do a decent amount of damage with even mediocre gears.

You can also get 500% of your existing HP by the new toogle they added
Thus the belt set you want to get is accuracy oriented mostly,am not 100% sure if thats the best belt but i know you want to maximize strength/vitality and accuracy so i guess best option would be to go for 3x s5 Hawks + 2xs3 unis/nms depending on the needs of each situation. in this case another viable choice would be 3x s1 dts and something to cap the vit p def (30%), no matter if its yetis golem genie or even mino.As for boss cards i go for Mephisto , Obsi and hector considering my merc lack’s p.def with my current gears but a high end merc can easily go for mephisto reviac and hector if he has the budget to do so .

There are 3 routes a Merc can go TP-wise:
1) 3-2-0 ( pre 7 tp ) : DD merc ,this goes on 3-3-1 as soon as you get all tps possible in the game , giving you the imortallity buff and extra ranks on the 3rd tree skilsl
2)0-3-2 : Tank merc , a really viable choice pre 7 tp with which you can solo pretty well getting the immortality buff but losing a load of damage
3) 2-3-0 : Hybrid Merc , you get deathblow , lvl 20 wild stream and immortality

Another thing worth saying is a merc can go 0-3-3 at 6 tp to be able to solo revived bosses well given the fact lust for blood damage increase only applies on single target skills.

1) 3-3-1 : Getting both deathblow and immortality , good for boss tanking.

2) 3-1-3 : Getting deathblow and lust for blood , damage oriented both aoe and 1v1

3) 2-2-3 : Good aoe damage and a mix of defense/ attack
Notable skills:
Wild stream : One of your best aoes

Dual strike : Your Best aoe
Invigorating aura : A great str/vit steroid along with a load of threat increase. every piece adds 15% str and vit per level , its a skill you want to have as high as possible without sacrifising lvl 26 wild stream.
Restrain: Restrain would be the main skill of a mercenary throughout the years , its a pretty damn strong hit that applies a 85% slow and abuses the damage increase merc gets off movement impaired targets, can be used with bow , used to kite a lot.
Immortality: Honestly i had never seen an immortality Merc before the 7 tp were possible , but its hell of an overpowered skill , it doesnt allow you to die for the duration.( Really op for pvp)
Deathblow: Deathblow is a skill similar to restrain , aggroes the mobs pretty damn well and reduces the p.attack of the target by about 50% ( even though it says 25) ( Can be used with lbow)
Remorselessness: a 72 crit power,1440 p attack steroid that makes merc pretty much puke on everyone.
Side note : Mercenaries now use Spears post 170 as they give the most physical attack in order to spam wild stream as effectively as possible.

Class evaluation : Merc is currently a pretty op class which when built correctly can solo mostly everythng around the game. easy to pick up.

Hope you found this guide helpful , thanks for your time =)

So , my second guide is gonna be a merc guide.
Merc is the master class of a holy warrior that went soldier on his second job change.
They are cappable of doing a load of things in the current patch (9.3) and are widely considered the best class around at the moment.
The reason for this is the fact that mercenary can get spammable wild stream , an AOE skill with no cast time and damage which does not diminish with more targets,which makes them ignore stats which were previously important (i.e. attack speed).
Thus the belt set you want to get is accuracy oriented mostly,am not 100% sure if thats the best belt but i know you want to maximize strength/vitality and accuracy so i guess best option would be 3x s3 cerbs ,1x s3 yeti 1x s0 golem(or s5 hawk and s2 golem for the extra 1% on p attack) ,mephisto , but if you are really comfortable and have the money to go for an end game build you can go 3x s3 cerbs along with s4 golem and s5 white dragon for the extra m attack
A non WS Merc should go for 3x s5 Hawks + 2xs3 unis/nms depending on the needs of each situation. in this case another viable choice would be 3x s1 dts and something to cap the vit p def (30%), no matter if its yetis golem genie or even mino.

There are 3 routes a Merc can go TP-wise:
1) 3-2-0 ( pre 7 tp ) : DD merc ,this goes on 3-3-1 as soon as you get all tps possible in the game , giving you the imortallity buff and extra ranks on the 3rd tree skilsl
2)0-3-2 : Tank merc , a really viable choice pre 7 tp with which you can solo pretty well getting the immortality buff but losing a load of damage
3) 2-3-0 : Hybrid Merc , you get deathblow , lvl 20 wild stream and immortality

Another thing worth saying is a merc can go 0-3-3 at 6 tp to be able to solo revived bosses well given the fact lust for blood damage increase only applies on single target skills.
Notable skills:
Wild stream : You want to get lvl 26 of this.
Invigorating aura : A great str/vit steroid along with a load of threat increase. every piece adds 15% str and vit per level , its a skill you want to have as high as possible without sacrifising lvl 26 wild stream.
Restrain: Restrain would be the main skill of a mercenary throughout the years , its a pretty damn strong hit that applies a 85% slow and abuses the damage increase merc gets off movement impaired targets, can be used with bow , used to kite a lot.
Immortality: Honestly i had never seen an immortality Merc before the 7 tp were possible , but its hell of an overpowered skill , it doesnt allow you to die for the duration.( Really op for pvp)
Deathblow: Deathblow is a skill similar to restrain , aggroes the mobs pretty damn well and reduces the p.attack of the target by about 50% ( even though it says 25)
Remorselessness: a 72 crit power,1440 p attack steroid that makes merc pretty much puke on everyone.
Side note : You might want to use an axe instead of a mace, people have been ignoring the fact that axes got more p attack than maces cause of the extra m attack on mace ,but since you are going for a spam wild stream set you are not gonna utilise the dot of it anyways so why care for m attack ?

Class evaluation : Merc is currently a pretty op class which when built correctly can solo mostly everythng aroung in this game. easy to pick up , but is pretty boring , hope you found this guide helpful , thanks for your time =)

Edit: here is a current benchmark i found on a +21 merc