I think it is worth it. One thing I will say, is that the fewer skills you have learned, the more likely this is to hit your skill focus as long as you still trigger it. To trigger the bonus on the level it goes off of a ratio of skills known at the 60% to 65% range (from my observation) or higher to Total skills you can practice. This includes skills at 100%. So for easy things to spam up in a level or two (defenses, kick, pugil, serp strike) I will practice those and get them up to buffer my skills known but cannot have my skills learn %s drop into that skill. Otherwise I only will practice what is essential until later on when I am done trying to use this as a mechanic to up skill levels (like I will buy bread on a paladin until 30+ cause I dont want to waste the potential for a skill learn from leveling to go here and hell if I am going to spam that shit.)