Doing the argus questline to unlock 900, 925, 950 is a bit tedious. I typically don't do quests on my alts but I recently tasked myself on doing the argus questline to unlock 950. My first few run through was with a friend which made it pretty easy for alt's (less geared or healer spec). You can have one person round up to tag mobs for kill count while the other person does click on objective stuff. After doing this, you will realize the shortest route. It still takes 1-2 hr ish depending on mob spawn and how fast you do it (character strength/gear/spec). But I found doing on my alts, even by myself is pretty painless now. I literially have whistle mapped out when to back and warframe usage for bosses that would take a long time.
The mission board gets pretty difficult to manage for the next week or two while you are gearing up your followers. Your followers will start running thin due to needing equipment missions and whatever else you send them out for. Another tedious thing is going out to get the spell caster minion token (I forgot the name of it). But whenever you collect gold from your alts, you will say... Worth!
Starting out with my alt's follower, I just put any equipment, flat success and counter onto my followers to boost their total success chance. I do not recommend going with green quality mission reduction yet. I find it pretty difficult to deal with 2 man missions due to the lower success rate unless you get lucky to counter with krokun soldier or have +20% success items (paladin, meatball, etc). Once you pass the green quality equipment, a few blue equipment items is all it takes to roll your guys out easily.