@BlackrazorNZ zolhan is crap for 1H melee. Just count the number of 1H melee auto attacker warlords in the compendium that uses it (here is one example [1.1.6.2] The new Carrot tank - Markovian S&B Warlord! SR 75+/Crucible buffless ) did you see an zolhan there? 
no
never max skills blindly, look at what an extra point gives. Like @Duchy mentioned, skills like Squad Tacticts does not scale well with extra points. And some skills have breakpoints, like Oleron you want 12/12, 16/12, 19/12 or 22/12. With field command, you get extra armor every 2nd point, and so on.
Divine mandate you can wait for until you have like 2.9k OA without Ascension.
The “only” farming you need to do really is to hit that urn to get M Totally Normal shield, the urn to get Fettan mask level 94 version, crabs (you can do them in elite) to get decent belt “of attack” and reset faction vendors. Now you are gonna buy chest and rings from coven and shoulders from malmouth. The trick to reset vendors is that they update inventory if you visit two other vendors. So just go back and forth between coven and steelclap. Start with coven faction vendor, then the regular vendor in coven then go to rift gate and transport to steelclap to visit the malmouth faction vendor. Then go back to coven, rise and repeat. Only buy stuff when they have good rolls. You can see max rolls in Grim Tools.