Getting my Barbarian King to lvl 5
I'm currently a TH7 and I have a lvl 3 Barbarian King. It was pretty tough to save up the DE(Lots of lightning spells, sorry to you guys who shun the use of DE zapping) and I really wanted to get hi mto lvl 5 before going to TH8. The Iron Fist ability looks really useful and while it may not be so good at lvl 5, its still the highest I can take him at TH7. So, I'm going to TH8 right now and I just wanted to ask whether I should try and steal a bunch of DE to get him to lvl 4, or wait to get the DE drill, and then take him there. I heard the DE drill was very efficient at pumping and it puts relief on you as far as getting DE goes. From my opinion, it looks like the DE drill takes a LONG time to pump it out(Assuming that mine will be lvl 1 and will stay lvl 1 for a while). Suggestions?